I would like to

1) make my own shape (a heat exchanger)
2) import this shape into c# .NET somehow
3) add measured values of temperature for this heat exchanger at different text labels around this shape

Questions

A) I cant find any examples supporting this? There are no examples of how to use the the Diagram Designer of how to make a figure and then import it into C# .NET - where do I find an example of that?

B) How do I make a shape in Diagram Designer so that I can add text at designated places at the shape? Where is there a examples of that?

C) In general - where do I find examples of how to use the Diagram Designer ??