AssemblyKeyFileAttribute Class
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AssemblyKeyFileAttribute Class


Specifies the name of a file containing the key pair used to generate a strong name.

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


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


Initializes a new instance of the AssemblyKeyFileAttribute class with the name of the file containing the key pair to generate a strong name for the assembly being attributed.


Gets the name of the file containing the key pair used to generate a strong name for the attributed assembly.


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 building a strong-named assembly, the author must supply either this attribute or AssemblyKeyNameAttribute. If AssemblyDelaySignAttribute has also been specified, it is likely that this file will only contain the public key.

An example of the syntax is [assembly:AssemblyKeyFileAttribute("myKey.snk")].


Since the path and file name persist, ensure that the string you use with AssemblyKeyFileAttribute does not contain sensitive information.

The following code example shows the use of the AssemblyDelaySignAttribute attribute with the AssemblyKeyFileAttribute. To compile this example, you must create a strong-name key file named TestPublicKey.snk using the Sn.exe (Strong Name Tool):

sn -k TestPublicKey.snk 

Compile the example as a .dll. If you compile from the command line, use the /t:library option for C# or Visual Basic, or the /LD linker option for Visual C++.

using System;
using System.Reflection;


namespace DelaySign
	public class Test { }

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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