AutoComplete TextBox from Database in C#

autocomplete textbox from database in c#
autocomplete combobox from database in c#

[@noct5101]

You are an amazing person

[@raizoyt3272]

very very nice

[@codingworld7920]

👍👍

[@Eng_Abdullah27]

I want if you insert name not there in data give you massagebox tell you the name not there