Exago .NET API Documentation
KeyColumns Property
Example 
WebReports.Api.Reports Namespace > Entity Class : KeyColumns Property
A collection of the Unique Key Fields on an Entity (Data Object). Unique Key Fields are columns which uniquely identify a record in this data object.
Syntax
public KeyColumnCollection KeyColumns {get;}
Remarks
An Entity (Data Object) must have at least one unique key field defined.
Example
myNewEntity.KeyColumns.Add(new KeyColumn(myNewEntity.GetColumn("ID").ActualFullName));
See Also

Reference

Entity Class
Entity Members