Unindent for C#

Example.cs

class Foo {
    static void Bar() {
        // The following strings are identical, but the first is prettier.

        string baz = @"
            Here's some text that will 
              be unindented here
                in a little while".Unindent();

        string sameAsBaz =
@"Here's some text that will 
  be unindented here
    in a little while";

    }
}

StringEx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

public static class StringEx
{
    public static string Unindent(this string str)
    {
        str = Regex.Replace(str, @"\A(\r\n|\r|\n)", "");
        var indent = str.Split('\n').Where(line => line.Trim().Length != 0).Select(line => line.IndexOf(new Regex(@"[^\s]"))).Where(count => count != -1).Min();
        return Regex.Replace(str, @"^( |\t){" + indent + "}", "", RegexOptions.Multiline);
    }

    public static int IndexOf(this string str, Regex regex)
    {
        var match = regex.Match(str);
        return match.Success ? match.Index : -1;
    }
}

unindent.rb

# Copyright © 2009 Martin Aumont (mynyml)
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
# of the Software, and to permit persons to whom the Software is furnished to do
# so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE. 

class String
  def unindent
    indent = self.split("\n").select {|line| !line.strip.empty? }.map {|line| line.index(/[^\s]/) }.compact.min
    self.gsub(/^[[:blank:]]{#{indent}}/, '')
  end
  def unindent!
    self.replace(self.unindent)
  end
end