I would give dapper dot net a try.
using (var connection = new SqlConnection(@"Data Source=127.0.0.1;Initial Catalog=TEST;User ID=as;Password=;Application Name=BRUCE_WAYNE"))
using (var multi = connection.QueryMultiple("exec MY_SP 4412 '20131016' "))
{
var resultSetOne = multi.Read().ToList();
// Do something to determine the type returned...
var resultSetTwo = multi.Read().ToList();
// Do something to determine the type returned...
}
I haven't tried this exact scenario but it should give you a hint to start from. For further information refer to the dapper dot net project site.