Web_PMSApi_Server_V1_Prod/MySOAP/ICalculatorService.cs

using System.ServiceModel;

namespace MySOAP
{
    [ServiceContract]
    public interface ICalculatorService
    {
        [OperationContract]
        double Add(double a, double b);

        [OperationContract]
        double Subtract(double a, double b);

        [OperationContract]
        double Multiply(double a, double b);

        [OperationContract]
        double Divide(double a, double b);
    }
}