Each C1DataColumn object within a C1List or C1Combo control stores its set of display value/value pairs in objects called ValueItem objects. The ValueItemCollection object is a collection of these pairs. This collection can be accessed through the Values property of the ValueItems object. For instance, in order to alter the first ValueItem in the collection, the code would look like:

To write code in Visual Basic

Me.C1List1.Columns(0).ValueItems.Values(0).DisplayValue = "Canada"

To write code in C#

this.c1List1.Columns[0].ValueItems.Values[0].DisplayValue = "Canada";