public void Find2()
{
DataSet ds = new DataSet();
ds.EnforceConstraints = false;
DataTable dt = new DataTable();
ds.Tables.Add(dt);
DataColumn dc = new DataColumn("Column A");
dt.Columns.Add(dc);
dt.PrimaryKey = new DataColumn[] { dc };
DataRow dr = dt.NewRow();
dr[0] = "a";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr[0] = "b";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr[0] = "c";
dt.Rows.Add(dr);
DataRow row = ds.Tables[0].Rows.Find(new object[] { "a" });
Assert.NotNull(row);
}