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When working in Win forms using C# and especially when you use the combo box , you would have noticed that by default the user can edit the values inside during the runtime.
How to disable editing of items in a combo box in c# (win forms) ?
Assuming that the combobox name is combobox1 , here the code to get this behavior.
comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;