Trim string from the end of a string in .NET - why is this missing?

Question

I need this all the time and am constantly frustrated that the Trim(), TrimStart() and TrimEnd() functions don\'t take strings as inputs. You call EndsWith() on a string, an

Answer 1

Trim(), TrimStart() and TrimEnd() are methods which replace all occurrences of the same character. That means you can only remove a series of blanks or a series of dots for example.

You could use a regular expression replace in order to accomplish this:

string s1 = "This is a sentence.TRIMTHIS";
string s2 = System.Text.RegularExpressions.Regex.Replace(s1, @"TRIMTHIS$", "");

You could wrap it in an extension method for convenience:

public static string TrimStringEnd(this string text, string removeThis)
{
    return System.Text.RegularExpressions.Regex.Replace(s1, removeThis, "");
}

And call it this way

string s2 = (@"This is a sentence.TRIMTHIS").TrimStringEnd(@"TRIMTHIS");