TypeLibVersionAttribute Class

Definition

Namespace:

System.Runtime.InteropServices

Assembly:

System.Runtime.InteropServices.dll

Source:

TypeLibVersionAttribute.cs

Specifies the version number of an exported type library.

public ref class TypeLibVersionAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Assembly, Inherited=false)]
public sealed class TypeLibVersionAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Assembly, Inherited=false)>]
type TypeLibVersionAttribute = class
    inherit Attribute

Public NotInheritable Class TypeLibVersionAttribute
Inherits Attribute

Inheritance

Object

Attribute

TypeLibVersionAttribute

Attributes

AttributeUsageAttribute

Examples

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

using namespace System;
using namespace System::Reflection;
using namespace System::Runtime::InteropServices;

[assembly: AssemblyVersion("1.2.500.0")];
[assembly: TypeLibVersion(1,25)];
namespace MyNamespace
{
    public ref class TheClass
    {
        // Insert code.
    };
};

using System;
using System.Reflection;
using System.Runtime.InteropServices;

[assembly: AssemblyVersion("1.2.500.0")]
[assembly: TypeLibVersion(1,25)]
namespace MyNamespace
{
    public class TheClass
    {
        // Insert code.
    }
}

Imports System.Reflection
Imports System.Runtime.InteropServices

<Assembly: AssemblyVersion("1.2.500.0")>
<Assembly: TypeLibVersion(1,25)>
Namespace MyNamespace
    Public Class TheClass
        ' Insert code.
    End Class
End Namespace

Remarks

You can apply this attribute to assemblies.

By default, the Tlbexp.exe (Type Library Exporter) 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.

Constructors

TypeLibVersionAttribute(Int32, Int32)

Initializes a new instance of the TypeLibVersionAttribute class with the major and minor version numbers of the type library.

Properties

MajorVersion	Gets the major version number of the type library.
MinorVersion	Gets the minor version number of the type library.
TypeId	When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute)

Methods

Equals(Object)	Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute)
GetHashCode()	Returns the hash code for this instance. (Inherited from Attribute)
GetType()	Gets the Type of the current instance. (Inherited from Object)
IsDefaultAttribute()	When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute)
Match(Object)	When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)

See also

• Tlbexp.exe (Type Library Exporter)