IronRuby.Builtins.Range.ToMutableString C# (CSharp) Method

        public MutableString/*!*/ ToMutableString(ConversionStorage<MutableString>/*!*/ tosConversion) {
            MutableString str = Protocols.ConvertToString(tosConversion, _begin);
            str.Append(Separator);
            str.Append(Protocols.ConvertToString(tosConversion, _end));
            return str;
        }
    }

 public static MutableString/*!*/ ToS(ConversionStorage<MutableString>/*!*/ tosConversion, Range/*!*/ self) {
     return self.ToMutableString(tosConversion);
 }