changing programming environment in VS2008

Hi All.  How do I change my developer settings from one language to another in 
visual studio 2008?  I want to change my default programming environment from 
say, visual c++ to cSharp.  I am also finding it a problem to build and run a 
very simple test cSharp code.  I am sure my code is entirely right, but the 
error seems to be from within the assembly.cs file.  If anyone can spot an 
error in this 4 line test code, I'd like to know
I have left out part of the generated code from the ide.
{
// Output test text to the screen
Console.WriteLine("This is a test!");
Console.ReadKey();
}
As far as i can see, the test code i have written should work just fine.
O, I'm running Vs2008 on WinXp Pro on the .net3.5 platform.  Cheers!

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