c# intellisense search bar for use with datagrid

Question

hi! i'm a new programmer and i was wondering.. how can you search using a textbox and the output comes out on the datagrid for example: I typed the letter "A" and all the names of a certain column, which starts with letter "A" is shown.. then i typed "B"  so the textbox contains "AB"  then all the names that starts with "AB" are shown in the datagrid.

can you help me? thanks :)