Remove file extension from a file name string

Question

If I have a string saying \"abc.txt\", is there a quick way to get a substring that is just \"abc\"?

I can\'t do an fileName.IndexOf(

Answer 1

String.LastIndexOf would work.

string fileName= "abc.123.txt";
int fileExtPos = fileName.LastIndexOf(".");
if (fileExtPos >= 0 )
 fileName= fileName.Substring(0, fileExtPos);