First of all it is "Contains" not "contains",C# is case-sensitive.
But i am using more restrictive method,Also a bit faster :
/*it takes the first 9 chars from userinput string and do case-sensitve comparison with "noob ----"*/
if(userInput.Substring(0,9) == "noob ----")
Don't forget comparison in c# & c++ is done with "==" not "=",in c# the compiler will complain but in c++ the condition will be always true and will cause many troubles at run-time.
You must learn how to teach yourself and specially how to seek information from MSDN library.