Trim a string in c# after special character

Question

I want to trim a string after a special character..

Lets say the string is str="arjunmenon.uking". I want to get the characters after the . and ignore the rest. I.e the resultant string must be restr="uking".

Answer 1

How about:

string foo = str.EverythingAfter('.');

using:

public static string EverythingAfter(this string value, char c)
{
    if(string.IsNullOrEmpty(value)) return value;
    int idx = value.IndexOf(c);
    return idx < 0 ? "" : value.Substring(idx + 1);
}

Answer 2

you can use like

string input = "arjunmenon.uking";
int index = input.LastIndexOf(".");
input = input.Substring(index+1, input.Split('.')[1].ToString().Length  );