Filter combobox the where combobox text match contains

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WinForms

C#7.2

I want to auto filter the combobox list items automatically if anywhere the text is matches in the list items using c# in winforms.


i.e

If the user enter "Jonne" in the combobox, suggestions list must filter as follows.

Jonne Mathew
Kent Jonne
Thoms Robert Jonne
Thoms Jonne

I am using the following code

What I have tried:

comboBoxDealerSearch.DataSource = dt;
comboBoxDealerSearch.DisplayMember = "Dealer_Name";
comboBoxDealerSearch.ValueMember = "Id";
comboBoxDealerSearch.AutoCompleteMode = 
AutoCompleteMode.SuggestAppend;
comboBoxDealerSearch.AutoCompleteSource = 
AutoCompleteSource.ListItems;