Can we override methods in WCF or web services? -

i want know if can override wcf methods or web service methods. if so, how?

try overloading wcf service methods

[servicecontract] public interface imycalculator  {         [operationcontract(name="addfloats")]         float add(float operand1, float operand2);          [operationcontract(name="addintegers")]         int add(int operand1,int operand2);  }