Abstraction in C#

This bog defines abstraction in C#.

using System;

using System.Collections.Generic;
using System.Linq;

namespace abstarction

{
public abstract class university
{
public abstract void BTech();
public abstract void MBA();
}

public class GBTU : university

{
public override void BTech()
{
Console.WriteLine("GBTU BTech Fee 50000/-");
}

public override void MBA()

{
Console.WriteLine("GBTU MBA Fee 100000/-");
}
}

public class MTU : university

{
public override void BTech()
{
Console.WriteLine("MTU BTech Fee 40000/-");
}
public override void MBA()
{
Console.WriteLine("MTU MBA Fee 800000/-");
}
}

class Program

{
static void Main(string[] args)
{
GBTU g = new GBTU();
g.BTech();
g.MBA();
MTU m = new MTU();
m.BTech();
m.MBA();
Console.ReadLine();
}
}
}