Check a string for numeric values

is this what you mean ?

public static bool CheckForNumeric (string stringtocheck)
{
     for (int i=0; i     {
          if (char.isNumber(stringtocheck[i]))
               return true;
     }
     return false;
}

this will return true if there is a number in the string...
if you want to check if a string is fully numeric then :

public static bool IsNumeric (string stringtocheck)
{
      try
      {
             double number = double.Parse(stringtocheck);
             return true;
       }
       catch
       {
             return false;
       }
}