❔ newbie here. how to make combobox display values from 2d array 2nd column, and do nothing if null?

this is visual studio windows form app combobox so i have a combobox called category. if i click the dropdown i want it to do nothing / display nothing if array is null. and if 2D array record has value, i want it it to display the 2nd column (category). i havent really put any values until i click the Add button my 2d array looks like this static int max = 12; //max number of records static int attributes = 4; //name, category, structure, definition fields string?[,] arrayRecord = new string[max, attributes]; i tried this but doesnt work, how to fix this? if (arrayRecord.Length == 0) { // does nothing } else { comboBoxCategory.Items.Clear(); //Clear items for (var i = 0; i < arrayRecord.Length; i++) { comboBoxCategory.Items.Add(arrayRecord[i, 1]); } } ty..