How Do I Can Discovery Datatype Of A String Value

public static class ConverterExtensions
{
  public static bool IsNumber(this string source)
  {
    if (string.IsNullOrWhitespace(source)) return false;

    const Types[] types = new Type[]{ 
      typeof(short), typeof(ushort), 
      typeof(int), typeof(uint), 
      typeof(long), typeof(ulong), 
      typeof(float), typeof(double), typeof(decimal)
    };
    foreach (Type type in types)
    {
      if (source.TryChangeType(type))
        return true;
    }
    return false;
  }

  public static bool TryChangeType(this string source, Type targetType)
  {
    try
    {
      Convert.ChangeType(source, targetType);
      return true;
    }
    catch (Exception)
    {
      return false;
    }
  }
}

string myString = "1";
int intVal = 0;
if(int.TryParse(myString, out intVal))
{

}

int.TryParse 

int temp = 0;
       string myString = "1";
      bool isNumber =  int.TryParse(myString, out temp);
      if (isNumber)
      {
          // it is a number
      }
      else
      {
          // Not a number
      }