Remove Trailing Zeroes From a String in C# using Regular Expressions

The code sample is that of a function RemoveTrailingZeros in C#, that takes a string input and removes all trailing zeros in it.

The code uses the Regex object provided by the .Net class library. Regular Expressions optimize the operation of "searching patterns" in a string. The following code can also be taken as an example to remove any character (trailing) from a string. The only change require will be that we need to change the Regular Expression.

//Regex is in System.Text.RegularExpressions namespace
public string RemoveTrailingZeroes(string input)
{
	Regex reg1 = new Regex("\\.\\d*(?<1>0+)[^\\d]*$", RegexOptions.IgnoreCase);
	
	Match m = reg1.Match(input);
	if( m.Success )
	{
		input = input.Replace(m.Groups["1"].Value, "");
		Regex reg2 = new Regex("(?<1>\\.)[^\\d]*$", RegexOptions.IgnoreCase); 
		m = reg2.Match(input);
		
		if( m.Success )
		{
			input = input.Replace(".", "" );
		}
		Regex reg3 = new Regex("\\d", RegexOptions.IgnoreCase );
		m = reg3.Match(input);
		if( !m.Success )
		{
			input = "0" + input;
		
		}

	}
	if(input.StartsWith("."))
		input = "0" + input;

	return input;
}