SEHException Class

Reference

Definition

Namespace:: System.Runtime.InteropServices

Assembly:: System.Runtime.InteropServices.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: SEHException.cs

Source:: SEHException.cs

Source:: SEHException.cs

Important

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Represents structured exception handling (SEH) errors.

public ref class SEHException : Exception

public ref class SEHException : System::Runtime::InteropServices::ExternalException

public class SEHException : Exception

public class SEHException : System.Runtime.InteropServices.ExternalException

[System.Serializable]
public class SEHException : System.Runtime.InteropServices.ExternalException

[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public class SEHException : System.Runtime.InteropServices.ExternalException

type SEHException = class
    inherit Exception

type SEHException = class
    inherit ExternalException

[<System.Serializable>]
type SEHException = class
    inherit ExternalException

[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type SEHException = class
    inherit ExternalException

Public Class SEHException
Inherits Exception

Public Class SEHException
Inherits ExternalException

Inheritance: Object

Exception
SEHException

Inheritance: Object

Exception

SystemException

ExternalException
SEHException

Attributes: SerializableAttribute ComVisibleAttribute

Remarks

The SEHException class handles SEH errors that are thrown from unmanaged code, but that have not been mapped to another .NET Framework exception. The SEHException class also corresponds to the HRESULT E_FAIL (0x80004005).

The .NET Framework often encounters unmanaged SEH exceptions that are automatically mapped to managed equivalents. There are two common unmanaged SEH exceptions:

STATUS_NO_MEMORY exceptions are automatically mapped to the OutOfMemoryException class.
STATUS_ACCESS_VIOLATION exceptions are automatically mapped as follows:
- If legacyNullReferencePolicy is applied, all access violations are mapped to the NullReferenceException class.
- If the address at which the read/write was attempted is not in JIT-compiled code, the exception is mapped to the AccessViolationException class.
- If the address at which the read/write was attempted is in JIT-compiled code, but it is not in the OS Null partition area, the exception is mapped to the AccessViolationException class.
- If there is no legacyNullReferencePolicy, and the address at which the read/write was attempted is in JIT-compiled code and in the OS Null partition area, the exception is mapped to the NullReferenceException class.

Any SEH exception that is not automatically mapped to a specific exception is mapped to the SEHException class by default.

Note that the SEHException class does not cause unmanaged C++ exception destructors to be called. To ensure that unmanaged C++ exception destructors are called, use the following syntax in the catch block.

Catch
     ' Handle catch here.
End Try

catch
{
     // Handle catch here.
}

catch(…)
{
     // Handle catch here.
}

Constructors

SEHException()	Initializes a new instance of the SEHException class.
SEHException(SerializationInfo, StreamingContext)	Obsolete. Initializes a new instance of the SEHException class from serialization data.
SEHException(String)	Initializes a new instance of the SEHException class with a specified message.
SEHException(String, Exception)	Initializes a new instance of the SEHException class with a specified error message and a reference to the inner exception that is the cause of this exception.

Properties

Data	Gets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception)
ErrorCode	Gets the `HRESULT` of the error. (Inherited from ExternalException)
HelpLink	Gets or sets a link to the help file associated with this exception. (Inherited from Exception)
HResult	Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception)
InnerException	Gets the Exception instance that caused the current exception. (Inherited from Exception)
Message	Gets a message that describes the current exception. (Inherited from Exception)
Source	Gets or sets the name of the application or the object that causes the error. (Inherited from Exception)
StackTrace	Gets a string representation of the immediate frames on the call stack. (Inherited from Exception)
TargetSite	Gets the method that throws the current exception. (Inherited from Exception)

Methods

CanResume()	Indicates whether the exception can be recovered from, and whether the code can continue from the point at which the exception was thrown.
Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
GetBaseException()	When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetObjectData(SerializationInfo, StreamingContext)	Obsolete. When overridden in a derived class, sets the SerializationInfo with information about the exception. (Inherited from Exception)
GetType()	Gets the runtime type of the current instance. (Inherited from Exception)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Creates and returns a string representation of the current exception. (Inherited from Exception)
ToString()	Returns a string that contains the HRESULT of the error. (Inherited from ExternalException)

Events

SerializeObjectState

Obsolete.

Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception.

(Inherited from Exception)

Applies to

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