How to pass Dynamically list class out parameter in C#?

public static void aaaaa(SqlConnection connection, CommandType commandType, string commandText, out  List<abc>, params SqlParameter[] commandParameters)
{
    abc aa=new abc();
    SqlCommand cmd = new SqlCommand();
    aa=  cmd.ExecuteReader(commandText);   
    cmd.CommandTimeout = 1000000;
    cmd.Parameters.Clear();
}