String manipulation question - (really simple, but I am VERY new to Microsoft Programming)

Question

I'm looking for string trim;

Example: a = "domain/user"; ( I need to trim the 'domain/' part off).

In other languages; the function I am looking for would be trim(), ltrim() or rtrim().

-TIA

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I don't know that this is the right way but this worked for me:

string.Substring(5, 6)

1.) My domain + the '\' is alway 5 characters
2.) Everything to the right of the '\' will always be 6 characters

So I guess I can do it that way right?  I'd really rather just trim from '\' all the way to the begining( left ), just in case the username format ever changes.