Static Members of the class

Static Members of the class

Static members belong to the whole class rather than to individual object
Static members are accessed with the name of class rather than reference to objects.
Eg:
class Test

{
public int rollNo;
public int mathsMarks;
public static int totalMathMarks;
}
class TestDemo
{
public static void main()
{
Test stud1 = new Test();
stud1.rollNo = 1;
stud1.mathsMarks = 40;
stud2.rollNo = 2;
stud2.mathsMarks = 43;
Test.totalMathsMarks = stud1.mathsMarks + stud2.mathsMarks;
}
}
Static Method of the class
<!--[if !supportLists]--> Methods that you can call directly without first creating an instance of a class. Eg: Main() Method, Console.WriteLine()<!--[endif]-->

<!--[if !supportLists]--> You can use static fields, methods, properties and even constructors which will be called before any instance of the class is created. <!--[endif]-->

<!--[if !supportLists]--> As static methods may be called without any reference to object, you can not use instance members inside static methods or properties, while you may call a static member from a non-static context. The reason for being able to call static members from non-static context is that static members belong to the class and are present irrespective of the existence of even a single object.<!--[endif]-->

Static Constructor
In C# it is possible to write a static no-parameter constructor for a class. Such a class is executed once, when first object of class is created.

One reason for writing a static constructor would be if your class has some static fields or properties that need to be initialized from an external source before the class is first used.
Eg:
Class MyClass
{
static MyClass()
{
//Initialization Code for static fields and properties.
}
}
Finalize() Method of Object class
Each class in C# is automatically (implicitly) inherited from the Object class which contains a method Finalize(). This method is guaranteed to be called when your object is garbage collected (removed from memory). You can override this method and put here code for freeing resources that you reserved when using the object.