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Determining if a String is a Valid Number by Parse functions

using System; using System.Data; class Class1{         static void Main(string[] args){       string IsNotNum = "111west";       string IsNum = "  +111  ";       string IsFloat = "  23.11  ";       string IsExp = "  +23 e+11  ";              Console.WriteLine(int.Parse(IsNum));             Console.WriteLine(float.Parse(IsNum));    // 111       Console.WriteLine(float.Parse(IsFloat));  // 23.11       //Console.WriteLine(float.Parse(IsExp));  // throws              try       {         Console.WriteLine(int.Parse(IsNotNum));       }       catch (FormatException e)       {         Console.WriteLine("Not a numeric value: {0}", e.ToString());  // throws       }         } }