I have few items on my ComboBox items collection, and i\'d like to select one item from this list and set it as default item - when app starts - this item is al
You can set using SelectedIndex
comboBox1.SelectedIndex= 1;
OR
SelectedItem
comboBox1.SelectedItem = "your value"; //
The latter won't throw an exception if the value is not available in the combobox
EDIT
If the value to be selected is not specific then you would be better off with this
comboBox1.SelectedIndex = comboBox1.Items.Count - 1;