Using indexOf to get userid from login credentials

I need to use c# to pull the userid from the user's login credentials.  I keep getting an error that says "[System.ArgumentOutOfRangeException] = {"Index and length must refer to a location within the string.\r\nParameter name: length"}"
string pmUser = "network\msmith";
int pos = pmUser.IndexOf("\\");
string userid = pmUser.Substring(pos + 1, pmUser.Length - pos)

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jmpattonAsked:
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nmarunCommented:
Here's a simpler version of what you're trying to achieve.string userid = pmUser.Substring(pmUser.IndexOf(@"\")+1);Arun
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nmarunCommented:
Plus you need an escape character '@' for the first line as well:string pmUser = @"network\msmith";Arun
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jmpattonAuthor Commented:
Thanks for the quick reply
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