Execute stored procedure in Entity Framework, return List<DataTable> or DataSet - entity-framework

Question

How do I modify the below method to return a List< DataTable> or a DataSet? I want to make it generic so it can return multiple resultsets from the database.
public static DataTable ExecuteStoredProcedure(ObjectContext db, string storedProcedureName, IEnumerable<SqlParameter> parameters)
{
var entityConnection = (EntityConnection) db.Connection;
var conn = entityConnection.StoreConnection;
var initialState = conn.State;
var dt = new DataTable();
try
{
if (initialState != ConnectionState.Open)
conn.Open();
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = storedProcedureName;
cmd.CommandType = CommandType.StoredProcedure;
foreach (var parameter in parameters)
{
cmd.Parameters.Add(parameter);
}
using (var reader = cmd.ExecuteReader())
{
dt.Load(reader);
reader.Close();
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (initialState != ConnectionState.Open)
conn.Close();
}
return dt;
}

Answer 1

I ended up doing it like this -
public static DataSet ExecuteStoredProcedure(ObjectContext db, string storedProcedureName, IEnumerable<SqlParameter> parameters)
{
var connectionString = ((EntityConnection)db.Connection).StoreConnection.ConnectionString;
var ds = new DataSet();
using (var conn = new SqlConnection(connectionString))
{
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = storedProcedureName;
cmd.CommandType = CommandType.StoredProcedure;
foreach (var parameter in parameters)
{
cmd.Parameters.Add(parameter);
}
using (var adapter = new SqlDataAdapter(cmd))
{
adapter.Fill(ds);
}
}
}
return ds;
}

Answer 2

reader.NextResult() should technically work. Here is the modified version:
public static DataSet ExecuteStoredProcedure(ObjectContext db, string storedProcedureName, IEnumerable<SqlParameter> parameters)
{
var entityConnection = (EntityConnection) db.Connection;
var conn = entityConnection.StoreConnection;
var initialState = conn.State;
DataSet dataSet = new DataSet();
try
{
if (initialState != ConnectionState.Open)
conn.Open();
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = storedProcedureName;
cmd.CommandType = CommandType.StoredProcedure;
foreach (var parameter in parameters)
{
cmd.Parameters.Add(parameter);
}
using (var reader = cmd.ExecuteReader())
{
do
{
DataTable dt = new DataTable();
dt.Load(reader);
dataSet.Tables.Add(dt);
}
while (reader.NextResult());
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (initialState != ConnectionState.Open)
conn.Close();
}
return dataSet;
}