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Marshal.GetTypeLibVersionForAssembly Method

Retrieves the version number of a type library that will be exported from the specified assembly.

Namespace:  System.Runtime.InteropServices
Assembly:  mscorlib (in mscorlib.dll)

public static void GetTypeLibVersionForAssembly(
	Assembly inputAssembly,
	out int majorVersion,
	out int minorVersion


Type: System.Reflection.Assembly
A managed assembly.
Type: System.Int32%
The major version number.
Type: System.Int32%
The minor version number.


inputAssembly is null.

Before exporting an assembly by using TypeLibExporterFlags with the CallerResolvedReferences value, you can use this method to retrieve the type library version from the assembly.

If you do not apply the TypeLibVersionAttribute attribute to an exported assembly to explicitly control the version number of the generated type library, the type library will have the same version number as the assembly.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

  • SecurityCriticalAttribute 

    requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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