using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(TestString("MD00494", 5));

        Console.WriteLine(TestString("XXX123YYY456"));

        Console.WriteLine(TestString("SD50MRF999", 3));

        Console.WriteLine(TestString("SD50MRF9", 3));

    }

    public static string TestString(string input, int minNumericalCharacters = 1)

    {

        return input + " : " + IncrementStringEnd(input, minNumericalCharacters);

    }

     public static string IncrementStringEnd(string name, int minNumericalCharacters = 1)

        {

            var prefix = System.Text.RegularExpressions.Regex.Match(name, @"\d+$");

            if (prefix.Success)

            {

                var capture = prefix.Captures[0];

                int number = int.Parse(capture.Value) + 1;

                name = name.Remove(capture.Index, capture.Length) + number.ToString("D" + minNumericalCharacters);

            }

​

            return name;

        }

}

​

​

​

    namespace RoslynCompileSample

    {public class StackPanel

{

public double Top{ get; set; }

public double Bottom{ get; set; }

public double Left{ get; set; }

public double Right{ get; set; }

public double CentreX{ get; set; }

public double CentreY{ get; set; }

}

public class MainClass

        {

            public void Main(string message)

            {

​

StackPanel StackPanel1 = new StackPanel();

StackPanel StackPanel2 = new StackPanel();

StackPanel StackPanel3 = new StackPanel();

StackPanel StackPanel4 = new StackPanel();

​

            }

        }

    }