Name
PreserveSigAttribute
Synopsis
When .NET converts a managed
method signature
to an unmanaged signature, it changes the return value to a parameter
that has the out and retval COM
attributes. Instead of the original return value, the unmanaged
method returns a COM HRESULT. If you want to override this behavior,
attach the PreserveSigAttribute to the method.
Something similar happens when you call unmanaged methods from
managed code. In that case, the [out,
retval] parameter on the COM side becomes the
return value, and an HRESULT that indicates an error condition is
translated into a .NET exception. If you want to be able to access
the HRESULT as a long return value, use the
PreserveSigAttribute on the methods in your COM
interface declaration (see
InterfaceTypeAttribute).
public sealed class PreserveSigAttribute : Attribute { // Public Constructors public PreserveSigAttribute( ); }
Hierarchy
System.Object
→
System.Attribute
→
PreserveSigAttribute
Valid On
Method