为什么-=运算符不像+ =那样调整Form大小？

Question

I can resize automatically my form size at run-time using:

Height += X

But

Height -= X

Has no side effect. It doesn't change anything in the form. Why that and how can I force the form to resize?

Answer 1

解决方案：

AutoSizeMode = GrowAndShrink;

Answer 2

It's possible that you are running into a minimum possible size issue - many controls allow you to access their size properties but do not allow changes or certain changes to come into effect. You can experiment with possible values in the designer and see which ones it rejects or alters.

It may be that a property of your form is affecting this - for example the MinimumSize property.