C# Variable Initialization Question

If the variable i is an instance variable, it will be assigned the value 0 automatically. If it is a local variable in a method, it is undefined, so you would need to assign it a value before using it.

For example:

class Program
{
    static void Main(string[] args)
    {
        intTest it;

        it = new intTest();

        Console.ReadLine();
    }

    class intTest
    {
        int i;

        public intTest()
        {
            int i2;

            Console.WriteLine("i = " + i);
            Console.WriteLine("i2 = " + i2);
        }
    }
}

The above will not compile because i2 is unassigned. However, by assigning 0 to i2, i.e.

int i2 = 0;

and compiling, then running, will show that both are now assigned 0.