title: how to define regular expression in c#
body: <p>I need to replace a all string in source code document using regex like this:<br>
  <code>strcpy(x,"string is string")</code> become <code>_tcscpy(x,_T("string is string"));</code>.<br>
  actually , i need surround all string in function with T_ marco<br>
  How to define a regular expression pattern in c# to do this?<br>
  thanks</p>