When and How Should I Use Static Methods and Classes in C#?

Static methods and classes in C#

In C#, adding the "static" keyword before a method indicates that the method is not associated with an instance of the class. This means that static methods can be accessed directly through the class name without instantiating the object.

Functionally speaking, static methods are defined in the class, but calling them does not require an instance of the class. They typically perform operations that do not require access to specific instance data or state.

<code class="language-csharp">public static void doSomething() {
   // 不需要对象实例
   // 可以直接使用类名调用：SomeClass.doSomething();
}</code>

In addition to static methods, classes can also be defined as "static". Static classes can only contain static members, including static methods, fields and properties. Unlike ordinary classes, static classes cannot be instantiated.

<code class="language-csharp">public static class StaticClass {
    public static int StaticProperty { get; set; }
    public static void StaticMethod() { }
}</code>

Static classes are used to define global functions or constants that are not tied to a specific instance of the class. They are used in the same way as static methods, using the class name:

<code class="language-csharp">StaticClass.StaticProperty = 10;
StaticClass.StaticMethod();</code>

By using static methods and classes, you can improve code organization, reduce the need for object instantiation, and enhance the encapsulation of class-level functionality.

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