Contents
Can I override extension method?
Extension methods cannot be overridden since they are not instance methods and they are not virtual. The compiler will complain if you import both extension method classes via namespace as it will not know which method to call: The call is ambiguous between the following methods or properties: …
Why Extension methods are static?
Extension methods enable you to “add” methods to existing types without creating a new derived type, recompiling, or otherwise modifying the original type. Extension methods are static methods, but they’re called as if they were instance methods on the extended type.
Why extension methods are static?
When do you need to use an extension method?
In general, we recommend that you implement extension methods sparingly and only when you have to. Whenever possible, client code that must extend an existing type should do so by creating a new type derived from the existing type. For more information, see Inheritance.
Why is the methodb extension method never called?
The MethodB extension method is never called because its name and signature exactly match methods already implemented by the classes. When the compiler cannot find an instance method with a matching signature, it will bind to a matching extension method if one exists.
How to use the castto < T > extension?
Enter the controversial extension method CastTo . With this extension method, you can write your code as a straightforward left-to-right sequence. void OnSelectionChanged (object sender, SelectionChangedEventArgs e) { var thing = sender.CastTo ().SelectedItem.CastTo ()?.Tag.CastTo ();
What are the different types of group extension?
Types of group extension methods In the previous chapter, the mass communication methods that the extension agent can employ in his work with farmers were reviewed. In this chapter, two other extension methods that the agent can employ will be examined.
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