Static Keyword in C#, unleashing Static keyword in C#

What is Static keyword in C#

“Static” keyword can be used for declaring a static member.The keyword Static can be applied to the Classes, field, method, properties, operator, event and constructors. Methods and variable  which we use as static doesn't need an instance to be created of a class.

Example of static keyword

class testclass

{

    public static int statint;

    public static void squareroot();

}

we can call the above static method and variable without creating the instance of the class

How to call a static method 

testclass.squareroot();

apart from this the static method can use only the static variables of same class.