There is no way just because there is no difference. The compilation of C# projects is totally and officially free. You don't need anything except the (freely redistributable) .NET Framework. (Even this is not required, because you can compile on the Mono platform, on Windows or other OS, and it will work on Windows without recompilation). Visual Studio is irrelevant here: it does not build anything at all. It is done via MSBuild.exe which in turn uses C# compiler, both included with the redistributable .NET Framework package.
If you want, you can develop everything without IDE, using just the regular text editor, but this is not a very convenient way.
As to the IDE, you can also use Visual Studio Express supplied free of charge. Alternatively, you can use the open-source tool like SharpDevelop.
Please see:
http://en.wikipedia.org/wiki/Visual_Studio[
^],
http://www.microsoft.com/visualstudio/en-us[
^],
http://en.wikipedia.org/wiki/Visual_Studio_Express[
^],
http://www.microsoft.com/visualstudio/en-us/products/2010-editions/express[
^],
http://en.wikipedia.org/wiki/SharpDevelop[
^],
http://www.icsharpcode.net/[
^],
http://en.wikipedia.org/wiki/Mono_%28software%29[
^],
http://www.mono-project.com/[
^].
[EDIT]
I removed your "solution" post because it's not supposed to be here, but I'll try to answer your question.
What you were asking about looked like the royalty fee. No, there is no such thing, not even close. I never heard that any serious development tools (expensive or not) took any royalty, ever. This is more typical for some low-quality bloated "graphical" highly "automated", "easy-to-use" tools, probably designed for complete morons and loosers.
Stay legal,
—SA
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