No mapping exists from object type to a known managed provider native type.

string connectionString = null;
                string sql = null;
                connectionString = "Server=(localdb)\\v11.0;Integrated Security=true;";
                using (SqlConnection cnn = new SqlConnection(connectionString))
                {
                    sql = "INSERT INTO EmailParser (Sender,Building,Level,Phase,Request) values(@Sender,@Building,@Level,@Phase,@Request)";
                    cnn.Open();
                    using (SqlCommand cmd = new SqlCommand(sql, cnn))
                    {
                        String d1 = m.Groups[4].ToString();
                        String d2 = m.Groups[9].ToString();
                        String int1 = m.Groups[14].ToString();
                        String word1 = m.Groups[19].ToString();

                        cmd.Parameters.AddWithValue("@Sender", email.From);
                        cmd.Parameters.AddWithValue("@Building", d1);
                        cmd.Parameters.AddWithValue("@Level", d2);
                        cmd.Parameters.AddWithValue("@Phase", int1);
                        cmd.Parameters.AddWithValue("@Request", word1);
                       
                        cmd.ExecuteNonQuery();}

string re4 = "(\\d)";
string re9 = "(\\d)";
string re14 = "(\\d+)";
string re19 = "([A-Za-z0-9/-]+)";