I spare beginners, draw a line with the line directly, the original is normal, because in other controls upper, need to put the usercontrol transparent background, the result can't see don't set the background transparent painting line, opaque line immediately, modify all the other attributes is invalid, ask why? How to solve? thank you

CodePudding user response:

Design is such, transparent background is used for container instead of drawing,
Control toolbox is not Line, Shape, can be placed in transparent containers,