can not close form by form.close() in c#

Question

I want to open one form through another form by means of a button and close current form. i found how to do that but i tried my way and could not do that. why this code does not work

private void Button1_Click(object sender, EventArgs e)
    {

            Advise1 form = new Advise1();
            form.Show();
            this.Close();


    }

I know how to solve my problem but i want to know why close() method do not close() first form. when i try this way two form are open after click on button.

Possible duplicate of [c# open a new form then close the current form?](https://stackoverflow.com/questions/5548746/c-sharp-open-a-new-form-then-close-the-current-form) — Cid, Aug 08 '19 at 09:35
@Sachin yes i searched but i did not understand why this way does not work :/ — , Aug 08 '19 at 09:35
Possible duplicate of [How to close form in C#](https://stackoverflow.com/questions/14381705/how-to-close-form-in-c-sharp) — Syafiqur__, Aug 08 '19 at 09:38
@Cid Corrected it, that was not problem, just a mistake in typing. :)) — , Aug 08 '19 at 09:43
I know how to solve my problem but i want to know why close() method do not close() first form. — , Aug 08 '19 at 09:45
Use this.Dispose(); or this.Close(); if you are calling function from the same class. — Sayed Muhammad Idrees, Aug 08 '19 at 11:44

score 1 · Answer 1 · answered Aug 08 '19 at 09:34

1

You don't say what your problem or error was, but the answer is likely in your main program's entry point - usually in program.cs:

static class Program
{
    [STAThread]
    static void Main(string[] args)
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Form1 form1 = new Form1();
        Application.Run(form1);
    }
}

Application.Run(form1); is basically saying "this instance of Form1 is my application, keep running until this form closes."

When you invoke this.Close(); you are closing your Form1 instance which is basically closing your whole application down.

answered Aug 08 '19 at 09:34

AlwaysLearning

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I tried this and receive error "'SetCompatibleTextRenderingDefault must be called before the first IWin32Window object is created in the application.'" – Aug 08 '19 at 09:41
I know how to solve my problem but i want to know why close() method do not close() first form. – Aug 08 '19 at 09:45
close() method in this way does not close whole app. – Aug 08 '19 at 09:45

can not close form by form.close() in c#

1 Answers1