Alleged RC4 .NET Class Library Files

The  ARC4 Cryptography  Provider Class Library is a  DLL file for .NET projects that includes an implementation of a well-known symmetric encryption algorithm that is not present in the System.Security.Cryptography namespace of the mscorlib library.

Copy the downloaded DLL file in a custom folder  on   your dev  folder. Create a  project in Visual Studio  IDE. In Solution Explorer, right-click on the References or Dependencies node and chooseeither Add Project Reference, select file ARC4Lib.dll to add, and then press OK.