ok! thank you :)

If you want to add a new column from table A to table B you should foreach the data row of the table a DataTable b, a; foreach (DataRow dr in a.Rows) { string id = dr["id"].ToString(); /// "id" is the primary key DataRow[] bDr = b.Select(string.Format("id = '{0}'", id)); bDr[0]["value"] = dr["value"]; // value is the new column you want to add }

There are a number of solutions out there try some google foo[^] Never underestimate the power of human stupidity RAH

shoubi wrote: I have another question, however it is not related to this. No problem, but you would have gotten more reactions if you created a new post. shoubi wrote: How do I import this dll into the C++ Using a Platform Invoke[^] would be the easy way to call unmanaged code. If you want to wrap an existing unmanaged type, then look here[^]. Enjoy :) I are Troll :suss: