Replacement for DataTable/DataSet in .NET Core (NET Standard 2.1)

DataTable now exists in .NET Core 2.0. See my answer at https://blogs.msdn.microsoft.com/devfish/2017/05/15/exploring-datatable-and-sqldbadapter-in-asp-net-core-2-0/ .

public static DataTable ExecuteDataTableSqlDA(SqlConnection conn, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)
 {
 System.Data.DataTable dt = new DataTable();
 System.Data.SqlClient.SqlDataAdapter da = new SqlDataAdapter(cmdText, conn);
 da.Fill(dt);
 return dt;
 }