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TypeLibVersionAttribute Class

Specifies the version number of an exported type library.

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

[ComVisibleAttribute(true)] 
[AttributeUsageAttribute(AttributeTargets.Assembly, Inherited=false)] 
public sealed class TypeLibVersionAttribute : Attribute
/** @attribute ComVisibleAttribute(true) */ 
/** @attribute AttributeUsageAttribute(AttributeTargets.Assembly, Inherited=false) */ 
public final class TypeLibVersionAttribute extends Attribute
ComVisibleAttribute(true) 
AttributeUsageAttribute(AttributeTargets.Assembly, Inherited=false) 
public final class TypeLibVersionAttribute extends Attribute

You can apply this attribute to assemblies.

By default, the Type Library Exporter (Tlbexp.exe) generates a type library version from the first two numbers of an assembly version. For example, Tlb.exe exports assembly version 1.2.5000.0 as a type library version 1.2, eliminating the build and revision numbers of the assembly. If this behavior is undesirable, you can control the generation of the type library number explicitly by applying the TypeLibVersionAttribute.

It is useful to control the generation of a type library version explicitly when two assembly versions produce the same type library version. For example, assembly version 1.2.0.0 and assembly version 1.2.500.0 both produce a type library version of 1.2, which can cause problems when you uninstall one of the assemblies. To differentiate the type library versions, you can force the second assembly (version 1.2.500.0) to produce a type library version of 1.25.

The following example shows how to apply the TypeLibVersionAttribute to explicitly set the type library version to 1.25.

using System;
 using System.Runtime.InteropServices;
 [Assembly: AssemblyVersion ("1.2.500.0")>
 [Assembly: TypeLibVersion(1,25)]
 namespace MyNamespace
 {
   class MyClass
   {
     // Insert code.
   }
 }
System.Object
   System.Attribute
    System.Runtime.InteropServices.TypeLibVersionAttribute
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1
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