I have a idea for designed window in winform. like below. I try the window opacity propriety.
But the Image also not visible. How to make this in winform.
I found this image in google. Thanks.
Try using the Form.TransparencyKey property
Make sure the background of the picture you use have the a certain color and set this color as the TransparencyKey.
You should also set the FormBorderStyle property to FormBorderStyle.None in order hide the form's title, border, etc:
The transparent borderless forms in C# article on C# Corner describes precisely what you are looking for. A simple search on Google [c#, borderless, transparant, window, form] did the job.