AssemblyDescriptionAttribute Class
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AssemblyDescriptionAttribute Class


Provides a text description for an assembly.

Namespace:   System.Reflection
Assembly:  mscorlib (in mscorlib.dll)


[AttributeUsageAttribute(AttributeTargets.Assembly, Inherited = false)]
public sealed class AssemblyDescriptionAttribute : Attribute


Initializes a new instance of the AssemblyDescriptionAttribute class.


Gets assembly description information.


When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)


This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.)


Returns the hash code for this instance.(Inherited from Attribute.)


Gets the Type of the current instance.(Inherited from Object.)


When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)


When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)


Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.)


Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)

System_CAPS_pubinterfaceSystem_CAPS_privmethod_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

When you create a project in Microsoft Visual Studio 2005, this attribute is automatically applied with an empty string value. You can set its value in Visual Studio 2005 by selecting the Properties for the project from the File menu, and then by clicking Assembly Information. The attribute is saved in the AssemblyInfo file in your project, and it must be removed before you can specify it in code; otherwise, you will get an error that the attribute cannot be applied multiple times.

When you right-click the assembly file in File Explorer, this attribute appears as the Comments value on the Version tab of the file properties dialog box.

The following code example sets the AssemblyDescriptionAttribute for a simple assembly and indicates whether or not it was defined.

using System;
using System.Reflection;

[assembly:AssemblyDescriptionAttribute("My Utility")]
public class Test {

    public static void Main() 
        //  Get the assembly.
        Assembly asm = Assembly.GetCallingAssembly();

        //  Verify that the description is applied.
        Type aType = typeof(AssemblyDescriptionAttribute);
        Console.WriteLine("Description applied: {0}", 
            asm.IsDefined(aType, false));
//  The output is:
//  Description Applied: True

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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