UnShort is a project mainly written in C#, it's free.
Link "unshortening" integration in .NET
unShort
Link "unshortening" integration into Windows (Linux to be worked on as needed) written in C#, on the .NET framework.
Of course, the developer realizes this has been done before, and done well. This is primarily an exercise in learning certain aspects of .NET programming in the C# language. However, there are portions of this that are potentially useful and/or contain elements some users may want not offered by other link "unshorteners".
Those wishing to assist in development or curious about the project may contact the GitHub repository creator
//Documentation as necessary