anchor.diff:  open System
   open System.Data
   open System.Data.SqlClient
  -open System.Transactions
   open Xunit
   
   [<Literal>]
  
positive.code:     Assert.Equal(0, GetBitCoin().Execute(bitCoinCode) |> Seq.length)
  
  [<Fact>]
  let implicitTransaction() =
      DeleteBitCoin().Execute(bitCoinCode) |> ignore
      use conn = new System.Data.SqlClient.SqlConnection(connectionString)
      conn.Open()
  
negative.code: open System.Transactions
  
  [<Fact>]
  let implicitTransaction() =
      DeleteBitCoin().Execute(bitCoinCode) |> ignore
      begin
          use tran = new TransactionScope() in
  