[Original] trend chart instance code (C #)

A trend chart is required for a recent project. in C #, the Code is not available, so you have to manually write a simple one. this trend chart supports defining Painter to implement different styles. two types of code are supported: block chart and line type.
Demo diagram:

Square chart:

Line chart: (multi-line display at the same time)

The relationships between classes are as follows:

Because I am not good at text expression, I have attached the source code (with demo)
/Files/kingthy/MyTest.rar