Call constructor for parent class

hi,
agree with "Vulpes".

A constructor can use the base keyword to call the constructor of a base class.

Please refer
http://msdn.microsoft.com/en-us/library/ms173115%28v=vs.80%29.aspx

http://stackoverflow.com/questions/12051/calling-base-constructor-in-c-sharp

hope this help.

You call the parent's constructor from the child's constructor.

1. class Base
2. {
3.   public Base(string sMessage)
4.   {
5.      //Code
6.   }
7. }

1. class Derived : Base
2. {
3.   public Derived(string someParams)
4.          : base("a string to be sent to parent's constructor" + someParams)
5.   {
6.   }
7. }

Also, you'll find a good explanation here

You can only call the constructor for a base class from a derived class's constructor. This is done using the ': base()' syntax.

For example:

using System;

class Parent
{
   public Parent()
   {
     Console.WriteLine("Hello from Parent's constructor which takes no parameters");
   }

   public Parent(string message)
   {
      Console.WriteLine(message);
   }
}

class Child : Parent 
{
   public Child(string message) : base(message) 
   {

   }

   public Child()  // calls base class's parameterless constructor automatically
   {

   }
}

class Test
{
   static void Main()
   {
       Child c = new Child("Hello from Parent's constructor which takes a string parameter");
       Child c2 = new Child(); 
       Console.ReadKey();
   }
}

Notice that the base class's parameterless constructor still gets called automatically even if you don't specify the ': base()' syntax.