C#创建画笔时由CustomStartCap，CustomEndCap，DashPattern三个参数抛出了ArgumentException异常，线段无法画出来，请问是怎么回事？

Question

C#创建画笔时由CustomStartCap，CustomEndCap，DashPattern三个参数抛出了ArgumentException异常，线段无法画出来

Answer 1

https://docs.microsoft.com/zh-cn/dotnet/api/system.drawing.pen.customstartcap?redirectedfrom=MSDN&view=netframework-4.8#System_Drawing_Pen_CustomStartCap