Thread: Consequence of c# Interfaces

I am learning c# language. I want to know what are Importance of c# Interfaces. Can anybody tell me Importance of c# Interfaces. Any help would be highly appreciated.

Thanks in advanced.

In this example, the interface IPoint haves the property declaration, which is responsible for setting and getting the values. The class MyPoint haves the property execution.

Code:

// keyword_interface.cs
// Interface implementation
using System;
interface IPoint 
{
   // Property signatures:
   int a
   {
      get; 
      set; 
   }

   int b
   {
      get; 
      set; 
   }
}

class MyPoint : IPoint 
{
   // Fields:
   private int myA;
   private int myB;

   // Constructor:
   public MyPoint(int a, int b) 
   {
      myA = a;
      myB = b;
   }

   // Property implementation:
   public int a 
   {
      get 
      {
         return myA;
      }

      set 
      {
         myA = value; 
      }
   }

   public int yb 
   {
      get 
      {
         return myB; 
      }
      set 
      {
         myB = value; 
      }
   }
}

class MainClass 
{
   private static void PrintPoint(IPoint p) 
   {
      Console.WriteLine("a={0}, b={1}", p.a, p.b);
   }

   public static void Main() 
   {
      MyPoint p = new MyPoint(2,3);
      Console.Write("My Point: ");
      PrintPoint(p);
   }
}