Hello Arun,
Sure, sorry I was a little unclear.
Here is my combobox code
chkLstBoxLists.DisplayMember = "alert";
chkLstBoxLists.ValueMember = "value";
chkLstBoxLists.DataSource = DataHandler.GetAlertTypes();
GetAlertTypes returns a list of class instances. with alert and value being properties.
When trying to solve the problem I searched online and found an article that said that perhaps the problem could be that properties name should be exact because displaymember and valuemember are case-sensitive.
I hope this makes sense.