Difference b/w private class vs sealed class with example

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C#

Hi,

Can anybody tell me about the Difference b/w private class vs sealed class with example.

Posted 29-May-12 20:12pm

Ashok Khatra.

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4 solutions

Solution 4

i give you link i hope it will help you

C# Tweaks – Why to use the sealed keyword on classes?[^]

public abstract sealed class MyFundooClass {}[^]

Object-Oriented Programming in C# .NET - Part 4[^]

Private : Only members of class have access. but it can be inherit in any class.
If you define a class as “Sealed” in C# and “NotInheritable” in VB.NET you can not
inherit the class any further.

now i will more clear with simple example

C#

private class abc // private class it
   {
       void abc()
       {
       }
       public  void show()
       {
           string abc = "";
       }
   }

   sealed class efg // Sealed class it
   {
       void efg()
       {
       }
       public void showefg()
       {
           string abc = "";
       }
   }

   public class cde : abc // in this class we inherit private class abc
   {
       void cde()
       {
           show(); // private class method show
       }
   }

   public class ghi : efg // we cannot inherit sealed class and it method
   {
       void ghi()
       {
           // not showing sealed class method  showefg() even it is public
       }
   }


protected void Page_Load(object sender, EventArgs e)
    {
        cde c = new cde();// calling private class method by inheritance
        c.show();
   }

Posted 29-May-12 20:21pm

Prosan

Updated 29-May-12 20:59pm

v4

Solution 1

see below link
http://forums.asp.net/t/1564250.aspx/1[^]

Posted 29-May-12 20:15pm

vangapally Naveen Kumar

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Prasad_Kulkarni · Accepted Answer · 2012-05-29T20:18:00

Private: Private limits the visiblity to a scope. Declaring a private class within a class means that "sub-class" can't be seen from outside of the class.
This is also true for methods and properties - they can be seen within the class, but not to any consumers or inheritors.
Private keyword is used for declaring class.

Sealed: If a class is declared as sealed, that means that you cannot inherit from the class. Sealed class can be used when a class is internal to the operation of the library, class or whwn you donot want that class to be overridden because it may affect the functionality.
Sealed keyword is used for declaring class

Pleae refer:
diff between sealed class and private class[^]
difference between Sealed Class and Private Class[^]

OriginalGriff · Accepted Answer · 2012-05-29T20:19:00

A Private class can only be accessed by the class it is defined and contain within - it is completely inaccessible to outside classes.
A Sealed class can be accessed by any class, but can not be derived from.

C#

public class A
  {
  private class B
     {
     }
  B b = new B();
  }
public class C
  {
  A.B b = new A.B(); // ERROR
  }

C#

public sealed class A
   {
   }
public class B : A //ERROR
   {
   }

Difference b/w private class vs sealed class with example

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