Multiples Table in DataReader

Question

I normally use DataSet because It is very flexible. Recently I am assigned code optimization task , To reduce hits to the database I am changing two queries in

Answer 1

I built on Pranay Rana's answer because I like keeping it as small as possible.

string rslt = "";
using (SqlDataReader dr = cmd.ExecuteReader())
{
    do
    {
        while (dr.Read())
        {
            rslt += $"ReqID: {dr["REQ_NR"]}, Shpr: {dr["SHPR_NR"]}, MultiLoc: {dr["MULTI_LOC"]}\r\n";
        }
    } while (dr.NextResult());
}