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This article mainly explains how to use the using keyword of C#. The content of the explanation in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn how to use the using keyword of C#.

Using keyword

The using keyword indicates that the program is using a name from a given namespace. For example, we use the System namespace in our program, where the class Console is defined. We can just write:

Console.WriteLine ("Hello there")

We can write a fully qualified name as follows:

System.Console.WriteLine ("Hello there")

You can also use the using namespace directive so that you don't have to precede the namespace name when using it. This directive tells the compiler that the subsequent code uses the name in the specified namespace. The following code demonstrates the application of namespaces.

Let's use using to specify to override the above instance:

Using System

Using first_space

Using second_space

Namespace first_space

{

Class abc

{

Public void func ()

{

Console.WriteLine ("Inside first_space")

}

}

}

Namespace second_space

{

Class efg

{

Public void func ()

{

Console.WriteLine ("Inside second_space")

}

}

}

Class TestClass

{

Static void Main (string [] args)

{

Abc fc = new abc ()

Efg sc = new efg ()

Fc.func ()

Sc.func ()

Console.ReadKey ()

}

}

When the above code is compiled and executed, it produces the following results:

Inside first_spaceInside second_space thank you for your reading, the above is the content of "how to use the using keyword of C#", after the study of this article, I believe you have a deeper understanding of how to use the using keyword of C#, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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