How I can solve this problem "System null reference error"

Question

static void Main(string[] args)
{
    Program obj = new Program();
    Console.WriteLine("Press 1 for PackMan 2 Ghost and 3 for AC FSM");
    string input = Console.ReadLine();

    //if (input == "1")
    //{
    obj.Packman();

[What is a NullReferenceException, and how do I fix it?](//stackoverflow.com/q/4660142) — Johnny Mopp, Sep 19 '19 at 19:33
Welcome to stackoverflow... https://stackoverflow.com/help/how-to-ask — quaabaam, Sep 19 '19 at 19:35
Please provide a [MVCE](https://stackoverflow.com/help/minimal-reproducible-example) in your question. As posted, there is no obvious NRE. — Kenneth K., Sep 19 '19 at 19:49

score -1 · Answer 1 · edited Sep 19 '19 at 20:20

If you're taking inputs as this

Console.WriteLine("Press 1 for PackMan 2 Ghost and 3 for AC FSM");

Then

You should try using switch case it will work

static void Main(string[] args) 
{ 
    Program obj = new Program();

    Console.WriteLine("Press 1 for PackMan 2 Ghost and 3 for AC FSM");
    string input = Console.ReadLine();

    Boolean exit= false;

    While(!exit){
        Switch (input)
        {
            case 1 :
                obj.Packman();
                break;
            case 2: 
                break;
            case 3: 
                break;
            case 4:
                Exit= true
        }
    }
}

When posting code, please format it appropriately so it is easy to read. Also, make sure it compiles. Your code as listed does not compile. — Chris Dunaway, Sep 19 '19 at 20:21

How I can solve this problem "System null reference error"

1 Answers1