Check out example codes for "acess base class in c#". It will help you in understanding the concepts better.

Code Example 1

using System;

public class A
{
   private int value = 10;

   public class B : A
   {
       public int GetValue()
       {
           return this.value;
       }
   }
}

public class C : A
{
//    public int GetValue()
//    {
//        return this.value;
//    }
}

public class Example
{
    public static void Main(string[] args)
    {
        var b = new A.B();
        Console.WriteLine(b.GetValue());
    }
}
// The example displays the following output:
//       10

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