... 23–4single 36Singleton class 61Solution explorer 89–90SQL 21, 59, 60sqlCommand 60sqlConnection 60streams 73 –4StreamReader 74 , 77 StreamWriter 74 , 77 string 10–12, 22matching 11StringBuilder ... Finite Difference model 105,111–14inheritance 35–56initialised variable 26insert method 64InsertCommand 68, 72 interfaces 46–53internal access modifier 27 InvokeMember 52Iprice 47 8, 57 IsBackground ... 76 , 77 CreateInstance 52CumulativeNormalDistributionclass 77 Current property 15, 16Ddata structures 9–18DataAdapter 59, 60, 68, 69 70 , 71 , 72 DeleteCommand 68, 72 ExecuteNonQuery 68–9InsertCommand...