Cannot access a disposed object?

Following Solution:

The problem is when you close form that it can not be used anymore you have to reopened.The code you posted tries to stop closing and only hides your window.If you want to doing this then you must set cancel-property true.

Private void Max_FormClosing(object sender, FormClosingEventArgs e)  

{

this.Hide();

this.Parent = null;

Cancel=true;

}

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