When you want to inherit (use the functionality of) another
class. Base Class Employee. A Manager class could be derived
from the Employee base class.

a class which contains all the 
properties,methods,variables  of its parent class .., and 
this method of adopting from any class is called 
inheritance....

In Inheritance we can use one class property into another 
class..
using System;
class sample
{
public void display()
{
Console.WriteLine("C#");
}
}
class sample1:sample 
//(Inheriting the property of class sample in class sample1)
{
public void disp()
{
Console.WriteLine("C++");
}
}
class Test
{
public static void Main()
{
sample1 sm=new sample1(); //creating a object of sample1 
sm.display(); //accessing function of sample class
sm.disp();
}
i think dear u got ur write answer..