How can we create a partial read-only textbox in windows forms c#?

I want to get details of the names where their surname is fixed(readonly) in the textbox and original name should be typed from the user end开发者_运维问答....Is there anyway to make it in windows forms...Please help me I would be really thankful.

---

Make two textboxes.

Set the ReadOnly property to true for one of them.