1. Create a structure Fraction (numerator, denominator). Accept details of n fraction and write a menu driven program to perform the following operations. Write separate functions for different options. Use dynamic memory allocation.
   i) Display the largest Fraction.
   ii) Display the smallest Fraction.
   iii) Sort Fraction.
   iv) Display all.
   Note: While accepting fractions, store the fractions in the reduced form.

Public Function GetMaxSerialNumber(ByVal docType) As Int32

      Dim db As Database = DatabaseFactory.CreateDatabase("igrwebConnectionString")

      Dim sqlCommand As String = SP\_UPDATE\_DOCUMENTDETAILS
      Dim dbCommand As DbCommand = db.GetStoredProcCommand(sqlCommand)
      db.AddInParameter(dbCommand, "@operationType", DbType.String, "R")
      db.AddInParameter(dbCommand, "@cType", DbType.Int64, docType)

      Dim SrNo As Integer = db.ExecuteScalar(dbCommand)
      Return SrNo + 1

  End Function

The above code is giving an exception at db.ExecuteScalar(dbCommand) Error is

ExecuteScalar requires the command to have a transaction when the connection assigned to the command is in a pending local transaction. The Transaction property of the command has not been initialized.

Please Help as i am new to enterprise library