Static variable in c#

// Declaration
static int myNum = 0;

//A static variable shares the value of it among all instances of the class.
//Example without declaring it static:

public class Variable
{
    public int i = 5;
    public void test()
    {
        i = i + 5;
        Console.WriteLine(i);
    }
}


public class Exercise
{
    static void Main()
    {
        Variable var = new Variable();
        var.test();
        Variable var1 = new Variable();
        var1.test();
        Console.ReadKey();
    }
}

/*
Explanation: If you look at the above example, I just declare the int variable.
When I run this code the output will be 10 and 10. Its simple.
*/

//Now let's look at the static variable here; I am declaring the variable as a static.
//Example with static variable:

public class Variable
{
    public static int i = 5;
    public void test()
    {
        i = i + 5;
        Console.WriteLine(i);
    }
}


public class Exercise
{
    static void Main()
    {
        Variable var = new Variable();
        var.test();
        Variable var1 = new Variable();
        var1.test();
        Console.ReadKey();
    }
}

/*
Now when I run above code, the output will be 10 and 15. So the static variable value
is shared among all instances of that class.
*/

Source: stackoverflow.com

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