UiPath Tutorial || Day 51 : Merge Data Table Activity (Along AddwithKey) || Data Table Activities

[@kunalmorande3224]

How to fill empty cells after merging with 'NA' value

[@mihaeladraghici7108]

Hello, thank you for this very interesting exercise. I did the same exercise and I get error : Multiple Assign: Can not assign 'New DataColumn(){dt_Dest.Columns("Employee ID")}' to 'dt_Dest.PrimaryKey'. System.InvalidOperationException: Can not assign 'New DataColumn(){dt_Dest.Columns("Employee ID")}' to 'dt_Dest.PrimaryKey'. ---> System.ArgumentException: These columns don't currently have unique values. at System.Data.ConstraintCollection.AddUniqueConstraint(UniqueConstraint constraint) at System.Data.ConstraintCollection.Add(Constraint constraint, Boolean addUniqueWhenAddingForeign) at System.Data.DataTable.set_PrimaryKey(DataColumn[] value)

[@williamchan7539]

How could I write it by C# language. I perform the way that you mentioned above by C# language but keep prompt error

[@jayanthbonala6413]

How to merge four datatable variables into one datatable variable