Function doesn't work, but it must work

Question

private void Main_OnLayoutUpdated(object sender, EventArgs e)
{
    label1.Content = Classes.Global.X.ToString();
    Classes.Global.PositionChanged(this);
}

PositionChanged writes to X new x-position of window. It works, but as soon as I delete label1 it stops working. No errors.

Answer 1

My guess, Classes.Global.X does something ( perhaps creates a singleton? ) and PositionChanged checks to see if something is null that x would of created and hence does nothing?

try var x = Classes.Global.X instead of the label.

Answer 2

如果删除label1，则尝试将任何内容设置为label1可能会通过被忽略的异常，可能是对象处置异常或null引用异常会导致该异常，请尝试将所有内容包装在try catch中并记录该异常。

Answer 3

I'll take a stab here and suggest not deleting label1, but simply setting label1's visible property to false.

At least that way you can maintain the method and not break the app.