Overloading Relational Operators : Relotional Operator Overload : Operator Overload C# Examples

    
using  System;

public  class  Employee:  IComparable
{
        public  Employee(string  name,  int  id)
        {
                this.name  =  name;
                this.id  =  id;
        }
        
        int  IComparable.CompareTo(object  obj)
        {
                Employee  emp2  =  (Employee)  obj;
                if  (this.id  >  emp2.id)
                return(1);
                if  (this.id  <  emp2.id)
                return(-1);
                else
                return(0);
        }
        public  static  bool  operator  <(Employee  emp1,  Employee  emp2)
        {
                IComparable  icomp  =  (IComparable)  emp1;
                return(icomp.CompareTo  (emp2)  <  0);
        }
        public  static  bool  operator  >(Employee  emp1,Employee  emp2)
        {
                IComparable        icomp  =  (IComparable)  emp1;
                return(icomp.CompareTo  (emp2)  >  0);
        }
        public  static  bool  operator  <=(Employee  emp1,Employee  emp2)
        {
                IComparable        icomp  =  (IComparable)  emp1;
                return(icomp.CompareTo  (emp2)  <=  0);
        }
        public  static  bool  operator  >=(Employee  emp1,Employee  emp2)
        {
                IComparable        icomp  =  (IComparable)  emp1;
                return(icomp.CompareTo  (emp2)  >=  0);
        }
        
        public  override  string  ToString()
        {
                return(name  +  ":"  +  id);
        }
        
        string        name;
        int        id;
}
class  Test
{
        public  static  void  Main()
        {
                Employee  a  =  new  Employee("A",  1);
                Employee  b  =  new  Employee("B",  2);
                Employee  c  =  new  Employee("C",  4);
                Employee  d  =  new  Employee("D",  3);
                
                Console.WriteLine("a  <  b:  {0}",  a  <  b);
                Console.WriteLine("c  >=  d:  {0}",  c  >=  d);
        }
}