Question

Currently, I have code like this:

    static void Main()
    {
        int whichClass = 0;
        if (whichClass == 0)
        {
            //repeat code
            TestAbstract clTest = new ClassA();
            clTest.MainFunc();
        }
        else if (whichClass == 1)
        {
            //repeat code
            TestAbstract clTest = new ClassB();
            clTest.MainFunc();
        }
        else if (whichClass == 10)
        {
            //repeat code
            TestAbstract clTest = new ClassX();
            clTest.MainFunc();
        }
    }

As you see, I have to write code 3 times for initial and call function at 3 different classes.

What I want is we just call 1 time with dynamic class. How can it is possible?

Answer 1

static void Main()
{
        int whichClass = 0;
        TestAbstract clTest = null;
        if (whichClass == 0)
            clTest = new ClassA();
        else if (whichClass == 1)
             clTest = new ClassB();
        else if (whichClass == 10)
             clTest = new ClassX();
        if(clTest != null)
             clTest.MainFunc();

}