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C# Interface

It's my first short tutorial.
How to use C# interface with class.
An interface contains only the signatures of methods, delegates or events.

Interfacae - its a rule,which describe a class.

For example:

//Our interface name is  : ILexSource
interface ILexSource
{
int CurrentLexValue { get; set; }// Set and get? what is it? how to use it? :)
}
class scaner : ILexSource
{
private ICharacterSource source;

public scaner(CharacterSource source)
{
  this.source = source;

}
//Method which has the same name as class is called - "CONSTRUCTOR"
What is it constructor? - When you are calling an instance,class automaticly calling a constructor :)


//SECOND INTERFACE

public interface ICharacterSource
{
void nextChar(); //Void it's a procedure,without a return type.
}
class CharacterSource : ICharacterSource
{
string mainString;  //our test string
public  CharacterSource(string str)
{
 this.mainString = str;
}

  public void nextChar()
         {

               Console.Write("YEAS I DID IT!);
         }

}   

How to use it.. ? :)

scaner Comp = new scaner(new CharacterSource(str); //here we are

Q:How can I call second class from first class?
A:Its very easy,in first class you should write a classs an alias.

private ICharacterSource source;

You can use it anywhere in class :)
Like this.

Source.nextChar(); //YEAS I DID IT!

That's all!
It's my first blog in english. :) Please comment it:)