Custom Route in MVC 4

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C#

.NET

MVC4

I want 2 create 3 controller such as Asp.Net, C#.Net, VB-Net and my action methods are 1D Array, Interface. But it showing error in my controller for the dot(.), hash(#) & it convert the VB-Net to VB_Net.
My Interface action method shows that its a key word, 1D Array has space, thats why shows error. So how to override this with my routes.MapRoute( ) method.