TextWriter.WriteLine Method

Reference

Definition

Namespace:: System.IO

Assemblies:: mscorlib.dll, System.IO.dll

Assemblies:: netstandard.dll, System.Runtime.dll

Assembly:: System.IO.dll

Assembly:: System.Runtime.Extensions.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Writes data to the text stream, followed by a line terminator.

Overloads

WriteLine(String, Object, Object)	Writes a formatted string and a new line to the text stream, using the same semantics as the Format(String, Object, Object) method.
WriteLine(Char[], Int32, Int32)	Writes a subarray of characters to the text stream, followed by a line terminator.
WriteLine(String, ReadOnlySpan<Object>)	Writes out a formatted string and a new line to the text stream, using the same semantics as Format(String, ReadOnlySpan<Object>).
WriteLine(String, Object[])	Writes out a formatted string and a new line to the text stream, using the same semantics as Format(String, Object).
WriteLine(String, Object)	Writes a formatted string and a new line to the text stream, using the same semantics as the Format(String, Object) method.
WriteLine(UInt64)	Writes the text representation of an 8-byte unsigned integer to the text stream, followed by a line terminator.
WriteLine(String, Object, Object, Object)	Writes out a formatted string and a new line to the text stream, using the same semantics as Format(String, Object).
WriteLine(UInt32)	Writes the text representation of a 4-byte unsigned integer to the text stream, followed by a line terminator.
WriteLine(StringBuilder)	Writes the text representation of a string builder to the text stream, followed by a line terminator.
WriteLine(String)	Writes a string to the text stream, followed by a line terminator.
WriteLine(Single)	Writes the text representation of a 4-byte floating-point value to the text stream, followed by a line terminator.
WriteLine(Double)	Writes the text representation of a 8-byte floating-point value to the text stream, followed by a line terminator.
WriteLine(Object)	Writes the text representation of an object to the text stream, by calling the `ToString` method on that object, followed by a line terminator.
WriteLine(Int64)	Writes the text representation of an 8-byte signed integer to the text stream, followed by a line terminator.
WriteLine(Int32)	Writes the text representation of a 4-byte signed integer to the text stream, followed by a line terminator.
WriteLine(Decimal)	Writes the text representation of a decimal value to the text stream, followed by a line terminator.
WriteLine(Char[])	Writes an array of characters to the text stream, followed by a line terminator.
WriteLine(Char)	Writes a character to the text stream, followed by a line terminator.
WriteLine(Boolean)	Writes the text representation of a `Boolean` value to the text stream, followed by a line terminator.
WriteLine()	Writes a line terminator to the text stream.
WriteLine(ReadOnlySpan<Char>)	Writes the text representation of a character span to the text stream, followed by a line terminator.

WriteLine(String, Object, Object)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes a formatted string and a new line to the text stream, using the same semantics as the Format(String, Object, Object) method.

public:
 virtual void WriteLine(System::String ^ format, System::Object ^ arg0, System::Object ^ arg1);

public virtual void WriteLine(string format, object arg0, object arg1);

public virtual void WriteLine(string format, object? arg0, object? arg1);

abstract member WriteLine : string * obj * obj -> unit
override this.WriteLine : string * obj * obj -> unit

Public Overridable Sub WriteLine (format As String, arg0 As Object, arg1 As Object)

Parameters

format: String

A composite format string.

arg0: Object

The first object to format and write.

arg1: Object

The second object to format and write.

Exceptions

ArgumentNullException

format is null.

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

FormatException

format is not a valid composite format string.

-or-

The index of a format item is less than 0 (zero), or greater than or equal to the number of objects to be formatted (which, for this method overload, is two).

Remarks

This method uses composite formatting to convert the value of an object to its string representation and to embed that representation in a string. .NET provides extensive formatting support, which is described in greater detail in the following formatting topics:

For more information about the composite formatting feature, see Composite Formatting.
For more information about numeric format specifiers, see Standard Numeric Format Strings and Custom Numeric Format Strings.
For more information about date and time format specifiers, see Standard Date and Time Format Strings and Custom Date and Time Format Strings.
For more information about enumeration format specifiers, see Enumeration Format Strings.
For more information about formatting, see Formatting Types.

The format parameter consists of zero or more runs of text intermixed with zero or more indexed placeholders, called format items, that correspond to an object in the parameter list of this method. The formatting process replaces each format item with the string representation of the value of the corresponding object.

The syntax of a format item is as follows:

{index[,length][:formatString]}

Elements in square brackets are optional. The following table describes each element. For more information about the composite formatting feature, including the syntax of a format item, see Composite Formatting.

Element	Description
index	The zero-based position in the parameter list of the object to be formatted. If the object specified by index is `null`, the format item is replaced by String.Empty. Because this overload has two objects in its parameter list, the value of index must always be 0 or 1. If there is no parameter in the index position, a FormatException is thrown.
,length	The minimum number of characters in the string representation of the parameter. If positive, the parameter is right-aligned; if negative, it is left-aligned.
:formatString	A standard or custom format string that is supported by the object to be formatted. Possible values for formatString are the same as the values supported by the object's `ToString(string format)` method. If formatString is not specified and the object to be formatted implements the IFormattable interface, `null` is passed as the value of the `format` parameter that is used as the IFormattable.ToString format string.

The leading and trailing brace characters, "{" and "}", are required. To specify a single literal brace character in format, specify two leading or trailing brace characters; that is, "{{" or "}}".

This method does not search the specified string for individual newline characters (hexadecimal 0x000a) and replace them with NewLine.

If a specified object is not referenced in the format string, it is ignored.

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(Char[], Int32, Int32)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes a subarray of characters to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(cli::array <char> ^ buffer, int index, int count);

public virtual void WriteLine(char[] buffer, int index, int count);

abstract member WriteLine : char[] * int * int -> unit
override this.WriteLine : char[] * int * int -> unit

Public Overridable Sub WriteLine (buffer As Char(), index As Integer, count As Integer)

Parameters

buffer: Char[]

The character array from which data is read.

index: Int32

The character position in buffer at which to start reading data.

count: Int32

The maximum number of characters to write.

Exceptions

ArgumentException

The buffer length minus index is less than count.

ArgumentNullException

The buffer parameter is null.

ArgumentOutOfRangeException

index or count is negative.

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

This method will write count characters of data into this TextWriter from the buffer character array starting at position index.

This overload is equivalent to calling the Write(Char[]) method followed by WriteLine for each character in buffer between index and (index + count).

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(String, ReadOnlySpan<Object>)

Writes out a formatted string and a new line to the text stream, using the same semantics as Format(String, ReadOnlySpan<Object>).

public:
 virtual void WriteLine(System::String ^ format, ReadOnlySpan<System::Object ^> arg);

public virtual void WriteLine(string format, scoped ReadOnlySpan<object?> arg);

abstract member WriteLine : string * ReadOnlySpan<obj> -> unit
override this.WriteLine : string * ReadOnlySpan<obj> -> unit

Public Overridable Sub WriteLine (format As String, arg As ReadOnlySpan(Of Object))

Parameters

format: String

A composite format string.

arg: ReadOnlySpan<Object>

An object span that contains zero or more objects to format and write.

Applies to

.NET 10 and .NET 9

Product	Versions
.NET	9, 10

WriteLine(String, Object[])

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes out a formatted string and a new line to the text stream, using the same semantics as Format(String, Object).

public:
 virtual void WriteLine(System::String ^ format, ... cli::array <System::Object ^> ^ arg);

public virtual void WriteLine(string format, params object[] arg);

public virtual void WriteLine(string format, params object?[] arg);

abstract member WriteLine : string * obj[] -> unit
override this.WriteLine : string * obj[] -> unit

Public Overridable Sub WriteLine (format As String, ParamArray arg As Object())

Parameters

format: String

A composite format string.

arg: Object[]

An object array that contains zero or more objects to format and write.

Exceptions

ArgumentNullException

A string or object is passed in as null.

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

FormatException

format is not a valid composite format string.

-or-

The index of a format item is less than 0 (zero), or greater than or equal to the length of the arg array.

Remarks

For more information about the composite formatting feature, see Composite Formatting.
For more information about numeric format specifiers, see Standard Numeric Format Strings and Custom Numeric Format Strings.
For more information about date and time format specifiers, see Standard Date and Time Format Strings and Custom Date and Time Format Strings.
For more information about enumeration format specifiers, see Enumeration Format Strings.
For more information about formatting, see Formatting Types.

The syntax of a format item is as follows:

{index[,length][:formatString]}

Element	Description
index	The zero-based position in the parameter list of the object to be formatted. If the object specified by index is `null`, the format item is replaced by String.Empty. Because this overload has an array in its parameter list, the value of index must always be less than the length of the array. If there is no parameter in the index position, a FormatException is thrown.
,length	The minimum number of characters in the string representation of the parameter. If positive, the parameter is right-aligned; if negative, it is left-aligned.
:formatString	A standard or custom format string that is supported by the object to be formatted. Possible values for formatString are the same as the values supported by the object's `ToString(string format)` method. If formatString is not specified and the object to be formatted implements the IFormattable interface, `null` is passed as the value of the `format` parameter that is used as the IFormattable.ToString format string.

The leading and trailing brace characters, "{" and "}", are required. To specify a single literal brace character in format, specify two leading or trailing brace characters; that is, "{{" or "}}".

This method does not search the specified string for individual newline characters (hexadecimal 0x000a) and replace them with NewLine.

If a specified object is not referenced in the format string, it is ignored.

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(String, Object)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes a formatted string and a new line to the text stream, using the same semantics as the Format(String, Object) method.

public:
 virtual void WriteLine(System::String ^ format, System::Object ^ arg0);

public virtual void WriteLine(string format, object arg0);

public virtual void WriteLine(string format, object? arg0);

abstract member WriteLine : string * obj -> unit
override this.WriteLine : string * obj -> unit

Public Overridable Sub WriteLine (format As String, arg0 As Object)

Parameters

format: String

A composite format string.

arg0: Object

The object to format and write.

Exceptions

ArgumentNullException

format is null.

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

FormatException

format is not a valid composite format string.

-or-

The index of a format item is less than 0 (zero), or greater than or equal to the number of objects to be formatted (which, for this method overload, is one).

Remarks

For more information about the composite formatting feature, see Composite Formatting.
For more information about numeric format specifiers, see Standard Numeric Format Strings and Custom Numeric Format Strings.
For more information about date and time format specifiers, see Standard Date and Time Format Strings and Custom Date and Time Format Strings.
For more information about enumeration format specifiers, see Enumeration Format Strings.
For more information about formatting, see Formatting Types.

The syntax of a format item is as follows:

{index[,length][:formatString]}

Element	Description
index	The zero-based position in the parameter list of the object to be formatted. If the object specified by index is `null`, the format item is replaced by String.Empty. Because this overload has only a single object in its parameter list, the value of index must always be 0. If there is no parameter in the index position, a FormatException is thrown.
,length	The minimum number of characters in the string representation of the parameter. If positive, the parameter is right-aligned; if negative, it is left-aligned.
:formatString	A standard or custom format string that is supported by the object to be formatted. Possible values for formatString are the same as the values supported by the object's `ToString(string format)` method. If formatString is not specified and the object to be formatted implements the IFormattable interface, `null` is passed as the value of the `format` parameter that is used as the IFormattable.ToString format string.

The leading and trailing brace characters, "{" and "}", are required. To specify a single literal brace character in format, specify two leading or trailing brace characters; that is, "{{" or "}}".

This method does not search the specified string for individual newline characters (hexadecimal 0x000a) and replace them with NewLine.

If a specified object is not referenced in the format string, it is ignored.

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(UInt64)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Important

This API is not CLS-compliant.

Writes the text representation of an 8-byte unsigned integer to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(System::UInt64 value);

[System.CLSCompliant(false)]
public virtual void WriteLine(ulong value);

[<System.CLSCompliant(false)>]
abstract member WriteLine : uint64 -> unit
override this.WriteLine : uint64 -> unit

Public Overridable Sub WriteLine (value As ULong)

Parameters

value: UInt64

The 8-byte unsigned integer to write.

Attributes: CLSCompliantAttribute

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

The text representation of the specified value is produced by calling the UInt64.ToString method. The FormatProvider property, if not null, specifies the culture-specific formatting.

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(String, Object, Object, Object)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes out a formatted string and a new line to the text stream, using the same semantics as Format(String, Object).

public:
 virtual void WriteLine(System::String ^ format, System::Object ^ arg0, System::Object ^ arg1, System::Object ^ arg2);

public virtual void WriteLine(string format, object arg0, object arg1, object arg2);

public virtual void WriteLine(string format, object? arg0, object? arg1, object? arg2);

abstract member WriteLine : string * obj * obj * obj -> unit
override this.WriteLine : string * obj * obj * obj -> unit

Public Overridable Sub WriteLine (format As String, arg0 As Object, arg1 As Object, arg2 As Object)

Parameters

format: String

A composite format string.

arg0: Object

The first object to format and write.

arg1: Object

The second object to format and write.

arg2: Object

The third object to format and write.

Exceptions

ArgumentNullException

format is null.

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

FormatException

format is not a valid composite format string.

-or-

The index of a format item is less than 0 (zero), or greater than or equal to the number of objects to be formatted (which, for this method overload, is three).

Remarks

For more information about the composite formatting feature, see Composite Formatting.
For more information about numeric format specifiers, see Standard Numeric Format Strings and Custom Numeric Format Strings.
For more information about date and time format specifiers, see Standard Date and Time Format Strings and Custom Date and Time Format Strings.
For more information about enumeration format specifiers, see Enumeration Format Strings.
For more information about formatting, see Formatting Types.

The syntax of a format item is as follows:

{index[,length][:formatString]}

Element	Description
index	The zero-based position in the parameter list of the object to be formatted. If the object specified by index is `null`, the format item is replaced by String.Empty. Because this overload has three objects in its parameter list, the value of index must always be 0, 1, or 2. If there is no parameter in the index position, a FormatException is thrown.
,length	The minimum number of characters in the string representation of the parameter. If positive, the parameter is right-aligned; if negative, it is left-aligned.
:formatString	A standard or custom format string that is supported by the object to be formatted. Possible values for formatString are the same as the values supported by the object's `ToString(string format)` method. If formatString is not specified and the object to be formatted implements the IFormattable interface, `null` is passed as the value of the `format` parameter that is used as the IFormattable.ToString format string.

The leading and trailing brace characters, "{" and "}", are required. To specify a single literal brace character in format, specify two leading or trailing brace characters; that is, "{{" or "}}".

This method does not search the specified string for individual newline characters (hexadecimal 0x000a) and replace them with NewLine.

If a specified object is not referenced in the format string, it is ignored.

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(UInt32)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Important

This API is not CLS-compliant.

Writes the text representation of a 4-byte unsigned integer to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(System::UInt32 value);

[System.CLSCompliant(false)]
public virtual void WriteLine(uint value);

[<System.CLSCompliant(false)>]
abstract member WriteLine : uint32 -> unit
override this.WriteLine : uint32 -> unit

Public Overridable Sub WriteLine (value As UInteger)

Parameters

value: UInt32

The 4-byte unsigned integer to write.

Attributes: CLSCompliantAttribute

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

The text representation of the specified value is produced by calling the UInt32.ToString method. The FormatProvider property, if not null, specifies the culture-specific formatting.

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(StringBuilder)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes the text representation of a string builder to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(System::Text::StringBuilder ^ value);

public virtual void WriteLine(System.Text.StringBuilder? value);

abstract member WriteLine : System.Text.StringBuilder -> unit
override this.WriteLine : System.Text.StringBuilder -> unit

Public Overridable Sub WriteLine (value As StringBuilder)

Parameters

value: StringBuilder

The string, as a string builder, to write to the text stream.

Remarks

The text representation of the specified value is produced by calling the StringBuilder.ToString method.

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10

WriteLine(String)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes a string to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(System::String ^ value);

public virtual void WriteLine(string value);

public virtual void WriteLine(string? value);

abstract member WriteLine : string -> unit
override this.WriteLine : string -> unit

Public Overridable Sub WriteLine (value As String)

Parameters

value: String

The string to write. If value is null, only the line terminator is written.

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

This overload is equivalent to the Write(Char[]) overload.

The line terminator is defined by the CoreNewLine field.

This method does not search the specified string for individual newline characters (hexadecimal 0x000a) and replace them with NewLine.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(Single)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes the text representation of a 4-byte floating-point value to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(float value);

public virtual void WriteLine(float value);

abstract member WriteLine : single -> unit
override this.WriteLine : single -> unit

Public Overridable Sub WriteLine (value As Single)

Parameters

value: Single

The 4-byte floating-point value to write.

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

The FormatProvider property, if not null, specifies the culture-specific formatting. For a list of common I/O tasks, see Common I/O Tasks.

The line terminator is defined by the CoreNewLine field.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(Double)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes the text representation of a 8-byte floating-point value to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(double value);

public virtual void WriteLine(double value);

abstract member WriteLine : double -> unit
override this.WriteLine : double -> unit

Public Overridable Sub WriteLine (value As Double)

Parameters

value: Double

The 8-byte floating-point value to write.

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

The FormatProvider property, if not null, specifies the culture-specific formatting. For a list of common I/O tasks, see Common I/O Tasks.

The line terminator is defined by the CoreNewLine field.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(Object)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes the text representation of an object to the text stream, by calling the ToString method on that object, followed by a line terminator.

public:
 virtual void WriteLine(System::Object ^ value);

public virtual void WriteLine(object value);

public virtual void WriteLine(object? value);

abstract member WriteLine : obj -> unit
override this.WriteLine : obj -> unit

Public Overridable Sub WriteLine (value As Object)

Parameters

value: Object

The object to write. If value is null, only the line terminator is written.

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

This overload is equivalent to the Write(String, Object) overload. The FormatProvider property, if not null, specifies the culture-specific formatting.

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(Int64)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes the text representation of an 8-byte signed integer to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(long value);

public virtual void WriteLine(long value);

abstract member WriteLine : int64 -> unit
override this.WriteLine : int64 -> unit

Public Overridable Sub WriteLine (value As Long)

Parameters

value: Int64

The 8-byte signed integer to write.

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

The text representation of the specified value is produced by calling the Int64.ToString method. The TextWriter.FormatProvider property, if not null, specifies the culture-specific formatting.

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(Int32)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes the text representation of a 4-byte signed integer to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(int value);

public virtual void WriteLine(int value);

abstract member WriteLine : int -> unit
override this.WriteLine : int -> unit

Public Overridable Sub WriteLine (value As Integer)

Parameters

value: Int32

The 4-byte signed integer to write.

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

The text representation of the specified value is produced by calling the Int32.ToString method. The TextWriter.FormatProvider property, if not null, specifies the culture-specific formatting.

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(Decimal)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes the text representation of a decimal value to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(System::Decimal value);

public virtual void WriteLine(decimal value);

abstract member WriteLine : decimal -> unit
override this.WriteLine : decimal -> unit

Public Overridable Sub WriteLine (value As Decimal)

Parameters

value: Decimal

The decimal value to write.

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

The FormatProvider property, if not null, specifies the culture-specific formatting. For a list of common I/O tasks, see Common I/O Tasks.

The line terminator is defined by the CoreNewLine field.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(Char[])

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes an array of characters to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(cli::array <char> ^ buffer);

public virtual void WriteLine(char[] buffer);

public virtual void WriteLine(char[]? buffer);

abstract member WriteLine : char[] -> unit
override this.WriteLine : char[] -> unit

Public Overridable Sub WriteLine (buffer As Char())

Parameters

buffer: Char[]

The character array from which data is read.

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

All the characters in buffer are written to the underlying stream. If the character array is null, only the line terminator is written.

This overload is equivalent to Write(Char[]) followed by WriteLine() .

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(Char)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes a character to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(char value);

public virtual void WriteLine(char value);

abstract member WriteLine : char -> unit
override this.WriteLine : char -> unit

Public Overridable Sub WriteLine (value As Char)

Parameters

value: Char

The character to write to the text stream.

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

This overload is equivalent to Write(Char) followed by WriteLine() .

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(Boolean)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes the text representation of a Boolean value to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(bool value);

public virtual void WriteLine(bool value);

abstract member WriteLine : bool -> unit
override this.WriteLine : bool -> unit

Public Overridable Sub WriteLine (value As Boolean)

Parameters

value: Boolean

The Boolean value to write.

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

The text representation of the specified value is produced by calling the Boolean.ToString method.

This method outputs either Boolean.TrueString or Boolean.FalseString.

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine()

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes a line terminator to the text stream.

public:
 virtual void WriteLine();

public virtual void WriteLine();

abstract member WriteLine : unit -> unit
override this.WriteLine : unit -> unit

Public Overridable Sub WriteLine ()

Exceptions

ObjectDisposedException

The TextWriter is closed.

IOException

An I/O error occurs.

Remarks

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

WriteLine(ReadOnlySpan<Char>)

Source:: TextWriter.cs

Source:: TextWriter.cs

Source:: TextWriter.cs

Writes the text representation of a character span to the text stream, followed by a line terminator.

public:
 virtual void WriteLine(ReadOnlySpan<char> buffer);

public virtual void WriteLine(ReadOnlySpan<char> buffer);

abstract member WriteLine : ReadOnlySpan<char> -> unit
override this.WriteLine : ReadOnlySpan<char> -> unit

Public Overridable Sub WriteLine (buffer As ReadOnlySpan(Of Char))

Parameters

buffer: ReadOnlySpan<Char>

The char span value to write to the text stream.

Remarks

The text representation of the specified value is produced by calling the ReadOnlySpan<Char>.ToString method.

The line terminator is defined by the CoreNewLine field.

For a list of common I/O tasks, see Common I/O Tasks.

Applies to

.NET 10 and other versions

Product	Versions
.NET	Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Standard	2.1

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TextWriter.WriteLine Method

Definition

Overloads

WriteLine(String, Object, Object)

Parameters

Exceptions

Remarks

See also

Applies to

WriteLine(Char[], Int32, Int32)

Parameters

Exceptions

Remarks

See also

Applies to

WriteLine(String, ReadOnlySpan<Object>)

Parameters

Applies to

WriteLine(String, Object[])

Parameters

Exceptions

Remarks

See also

Applies to

WriteLine(String, Object)

Parameters

Exceptions

Remarks

See also

Applies to

WriteLine(UInt64)

Parameters

Exceptions

Remarks

See also

Applies to

WriteLine(String, Object, Object, Object)

Parameters

Exceptions

Remarks

See also

Applies to

WriteLine(UInt32)

Parameters

Exceptions

Remarks

See also

Applies to

WriteLine(StringBuilder)

Parameters

Remarks

Applies to

WriteLine(String)

Parameters

Exceptions

Remarks

See also

Applies to

WriteLine(Single)

Parameters

Exceptions

Remarks

See also

Applies to

WriteLine(Double)

Parameters

Exceptions

Remarks

See also

Applies to

WriteLine(Object)

Parameters

Exceptions

Remarks

See also

Applies to

WriteLine(Int64)

Parameters

Exceptions