CODEWITHSUNDEEP
c#.netasp.netinheritance
AspOnMyNet
AspOnMyNet

Reputation: 1998

Overriding and overridden methods must have same accessibility, so why isn’t same true for Page.CreateChildControls()?

Methods marked as virtual can be overridden in derived classes. One of the restrictions is that overriding and overridden methods must have same accessibility. Thus, if virtual method is marked as protected internal, then overriding method must also be marked as protected internal (it cannot be for example marked as just protected).

Since Page class overrides Control.CreateChildControls(), which is marked as protected internal, then Page.CreateChildControls() should also be marked as protected internal, but instead is marked as protected. How is that possible?

Upvotes: 1

Views: 523

Answers (2)

John Rasch
John Rasch

Reputation: 63445

Could it be you were looking at this incorrect example on MSDN:

protected override void CreateChildControls()
{               
   // Creates a new ControlCollection. 
   this.CreateControlCollection();

   // Create child controls.
    ChildControl firstControl = new ChildControl();
   firstControl.Message = "FirstChildControl";

   ChildControl secondControl = new ChildControl();
   secondControl.Message = "SecondChildControl";

   Controls.Add(firstControl);
   Controls.Add(secondControl);

   // Prevent child controls from being created again.
   ChildControlsCreated = true;
}

Source: http://msdn.microsoft.com/en-us/library/system.web.ui.control.createcontrolcollection.aspx

Upvotes: 1

Asad
Asad

Reputation: 21928

I probably did not get your question right. This is what i found at MSDN for Control.CreateChildControls

protected internal virtual void CreateChildControls()

Upvotes: 2

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