How to use Interface in c#.

 

Interface:- It is like an abstract class.
it is use to support multiple inheritance
it can not contain concrete method	
Abstract class		        Interface
==============		        ===========
1)It can contain 	        1)Not allowed
concrete method
2)Access modifiers-private      2)Public
3)Multiple inheritance not      3)do also
	

Code:

interface a
{
	void display(); //it cant be public
			//By default it is abstract and public
}
interface b
{
	void display1();
}
class c : a,b
{
	public void display()
	{
		System.Console.WriteLine("Interface");
	}
	public void display1()
	{
		System.Console.WriteLine("Interface one");
	}
}
class d
{
	public static void Main()
	{
		c t=new c();
		t.display();
		t.display1();
	}
}