Full outer join, on 2 data tables, with a list of columns

Question

I have 2 data tables, which I do not know their list of data columns. This list must be extracted at run time, and be used for the full outer join.

When using these

Answer 1

This might work for you

var commonColumns = dt1.Columns.OfType().Intersect(dt2.Columns.OfType(), new DataColumnComparer());
        DataTable result = new DataTable();

        dt1.PrimaryKey = commonColumns.ToArray();

        result.Merge(dt1, false, MissingSchemaAction.AddWithKey);
        result.Merge(dt2, false, MissingSchemaAction.AddWithKey);