What do you need to write a 3D editor in C#?

Question

C++ / C#

Good afternoon, I wondered how you can write a 3D editor in C#. I assume that with the use of a graphics library, but for sure this is not enough.
Let knowledgeable people prompt, please write down the points.

Answer 1

Point 1: Learn programming, learn how to use different libraries.
Item 2: Write a simpler program to begin with, which you already understand how to write. And better pieces 5.
Point 3: Work in existing 3D editors, write a list of features that you already understood how to implement at least on paper.
Seriously.
The question shows that you are not ready to write a difficult task if you want to be chewed on the points. Chewing won't help until you're technically ready.
Again, it is not clear how you are with mathematics, especially geometry.