VS 2013 Downloaded a class library (.dll) But Not Working !!!

Hi EveryOne
Two Days Ago I Downloaded many class libraries among them one from this website


.NET random number generators and distributions - CodeProject





and i managed to add it to Visual Studio 2013


But the thing is none of functions are working


for example the function IsValidAlpha supposed to return TRUE or False
instead it does nothing at ALL


this is a preview

Attached Images