File.AppendAllBytes Method
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| AppendAllBytes(String, Byte[]) |
Appends the specified byte array to the end of the file at the given path. If the file doesn't exist, this method creates a new file. |
| AppendAllBytes(String, ReadOnlySpan<Byte>) |
Appends the specified byte array to the end of the file at the given path. If the file doesn't exist, this method creates a new file. |
- Source:
- File.cs
Appends the specified byte array to the end of the file at the given path.
If the file doesn't exist, this method creates a new file.
public:
static void AppendAllBytes(System::String ^ path, cli::array <System::Byte> ^ bytes);public static void AppendAllBytes(string path, byte[] bytes);static member AppendAllBytes : string * byte[] -> unitPublic Shared Sub AppendAllBytes (path As String, bytes As Byte())Parameters
- path
- String
The file to append to.
- bytes
- Byte[]
The bytes to append to the file.
Exceptions
path or bytes is null.
path is empty.
The specified path, file name, or both exceed the system-defined maximum length.
The specified path is invalid (for example, it is on an unmapped drive).
An I/O error occurred while opening the file.
path specified a file that is read-only.
-or-
path specified a file that is hidden.
-or-
path specified a directory.
-or-
The caller does not have the required permission.
-or-
This operation is not supported on the current platform.
path is in an invalid format.
Applies to
.NET 10 and .NET 9
| Product | Versions |
|---|---|
| .NET | 9, 10 |
Appends the specified byte array to the end of the file at the given path.
If the file doesn't exist, this method creates a new file.
public:
static void AppendAllBytes(System::String ^ path, ReadOnlySpan<System::Byte> bytes);public static void AppendAllBytes(string path, ReadOnlySpan<byte> bytes);static member AppendAllBytes : string * ReadOnlySpan<byte> -> unitPublic Shared Sub AppendAllBytes (path As String, bytes As ReadOnlySpan(Of Byte))Parameters
- path
- String
The file to append to.
- bytes
- ReadOnlySpan<Byte>
The bytes to append to the file.
Exceptions
path is null.
path is empty.
The specified path, file name, or both exceed the system-defined maximum length.
The specified path is invalid (for example, it is on an unmapped drive).
An I/O error occurred while opening the file.
path specified a file that is read-only.
-or-
path specified a file that is hidden.
-or-
path specified a directory.
The caller does not have the required permission.
-or-
This operation is not supported on the current platform.
path is in an invalid format.
Applies to
.NET 10 and .NET 9
| Product | Versions |
|---|---|
| .NET | 9, 10 |
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