Form has controls at design-time but when I run project it shows empty form - winforms

hello i ran into this problem and i don't know how to fix it it was working just fine but now when i try to start project this is form it should show but instead
it is like that only blank form
please help and thank you <3

Two common reasons :
You forgot to call InitializeComponent in constructor.
Or you have Application.Run(new Form()) which you want ...Form1()).

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The test recorder is not generating any code in that case. It seems that it is only working with buttons, which have a non-empty String as name, as they are simply invoked by
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Looks like that's a known bug. It's logged here: https://github.com/prajwalkman/angular-slider/issues/36
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I have created an empty project. after that, I added new items is Windows Form and add some component such as button or textbox in Design View.
In main file, I use this code:
SimpleForm form = new SimpleForm(); // SimpleForm is my class
form.Show();
But, when I run, C# generate a form but I cannot see textbox nor button. I just see blank area where I put those components. As picture below, the white area is my button, but I don't know why this button cannot show. I think maybe some problem, and those components cannot draw on the form.
Please help me this error.
Thanks :)
If by "the main file" you mean your main method (the entry point) - try this code instead:
Application.EnableVisualStyles();
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If not you really need to post more of your code to get a reasonable answer.

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