See SqlDataReader.NextResult (an SqlDataReader is returned from calling SqlCommand.ExecuteReader):
Advances the data reader to the next result [set], when reading the results of batch Transact-SQL statements.
Example:
string commandText = @"SELECT Id, ContactId
FROM dbo.Subscriptions;
SELECT Id, [Name]
FROM dbo.Contacts;";
List<Subscription> subscriptions = new List<Subscription>();
List<Contact> contacts = new List<Contact>();
using (SqlConnection dbConnection = new SqlConnection(@"Data Source=server;Database=database;Integrated Security=true;"))
{
dbConnection.Open();
using (SqlCommand dbCommand = dbConnection.CreateCommand())
{
dbCommand.CommandText = commandText;
using(SqlDataReader reader = dbCommand.ExecuteReader())
{
while(reader.Read())
{
subscriptions.Add(new Subscription()
{
Id = (int)reader["Id"],
ContactId = (int)reader["ContactId"]
});
}
// this advances to the next resultset
reader.NextResult();
while(reader.Read())
{
contacts.Add(new Contact()
{
Id = (int)reader["Id"],
Name = (string)reader["Name"]
});
}
}
}
}
Other examples: