Merge two data table columns!

I have two data tables with the same functionality. I found a code that combines these two, but this code I found deletes the column that says “Dönem” in the 2nd data table, how can I prevent this.There should be 2 columns that say “Dönem”

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It was happening before but when I added the following codes it stopped happening

(StatusDT.Rows(0).ItemArray(2).ToString+“,”+String.Join(“,”,StatusDT.Rows(0).ItemArray.Skip(4))).Split(“,”)

(StatusDT.Rows(1).ItemArray(2).ToString+“,”+String.Join(“,”,String.Join(“,“c,StatusDT.Rows(1).ItemArray).Split(CChar(”,”)).Skip(4).ToList)).Split(“,”).tolIst

In merge datatable if 2 columns are same it will combine them and take one column name only but if you use join datatable then both columns will be available . You can remove whichever is not required later.

how can I do that