24th of the. NET basic example series: genealogy software (1)

Recently, I was busy playing around with Oracle. C # had a lot of homework. I took out the WPF family tree software I wrote intermittently some time ago and sorted it out. It's better to remember it than to write it out, cut down two images and write some intermediate problems later. Resolved:
1) The biggest problem encountered is how to arrange the tree chart in a regular manner.
2) When dragging an object, we still ensure that the arrow of the connection line always points to the center of the object.
3) how to embed a font file.
4) Data Storage: currently, XML is directly used. Next we plan to switch to SQLite.

Figure 1: Move the mouse to the node to display the add, delete, and modify options

Figure 2: scaled