Strategy_Pattern
namespace WindowsFormsApp { public interface IEmployeeSal { float GetSalary(int basic,float dividend,float commission); } } namespace WindowsFormsApp { public class HRDeptSalary : IEmployeeSal { // @Override public float GetSalary(int basic, float dividend, float commission) { return basic + dividend+commission; } } public class SalesDept : IEmployeeSal { // @Override public float GetSalary(int basic, float dividend, float commission) { return basic + dividend+commission; } } public class Purchase...