The SyntaxHighlighter is very clever, and can display a lot of different code types, for example C#.
//Here is some C# Code
public void Method()
string test = "display some code in my blog";
test = test.tostring() + "and format it nicely";
There is a nice blog post by Arun K Viswanathan on how to easily adapt the code to work in Blogger. Check it out.