What is extension method definition?

July 28, 2019 Off By idswater

What is extension method definition?

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.

What is MethodInfo?

The MethodInfo class represents a method of a type. You can execute a method on a class instance by calling the Invoke method. You can instantiate a MethodInfo object that represents a constructed generic method from one that represents a generic method definition by calling the MakeGenericMethod method.

How to find Extension method in c#?

Extension Method In C#

  1. It is a static method.
  2. It must be located in a static class.
  3. It uses the “this” keyword as the first parameter with a type in .
  4. It also shown by VS intellisense.
  5. An Extension Method should be in the same namespace as it is used or you need to import the namespace of the class by a using statement.

Are extension methods bad?

So if extension methods and extension properties are really static methods and properties. And static methods and properties and methods are not thread safe and therefore should be avoided then extension methods and extension properties are bad.

Why extension methods are static?

The main use case for static classes is to group helper methods together (e.g. Path , Directory , ProtectedData …), and extension methods are basically helper methods. It wouldn’t make sense to be able to create an instance of Enumerable or Queryable , for example.

Are extension methods good?

Are extension methods thread safe?

No, it is not thread-safe. While it looks like the EventHandler<> reference is copied through the method argument, this is not what happens at runtime. Extension methods are subject to being inlined, just like a regular instance method. Neither version is threadsafe, depending on what you mean by “threadsafe”.

What are the advantages of properties in C#?

The main advantage of properties is that they allow us to encapsulate our data inside our class in such a way that we can control access to our class’s data through only the properties and not by allowing outside programs to access our fields directly.

What does the methodinfo object do in reflection?

Returns an array of Type objects that represent the type arguments of a generic method or the type parameters of a generic method definition. Returns a MethodInfo object that represents a generic method definition from which the current method can be constructed. Returns the hash code for this instance.

Is there a technique using reflection to identify extension methods?

In C# is there a technique using reflection to determine if a method has been added to a class as an extension method? Given an extension method such as the one shown below is it possible to determine that Reverse () has been added to the string class?

How to use methodinfo class in Microsoft Docs?

The MethodInfo class represents a method of a type. You can use a MethodInfo object to obtain information about the method that the object represents and to invoke the method. For example:

How to identify an extension method in Stack Overflow?

Suppose an extension method void Foo (this Customer someCustomer) is defined. Suppose, also, that Customer is modified and the method void Foo () is added. Then, the new method on Customer will cover/hide the extension method. Thanks for contributing an answer to Stack Overflow!