mono fix: Array index out of range
mono fix: Array index out of range

DataReader.VisibleFieldCount returns zero on mono. Use column types.Length instead.

philipcpresley/FSharp.Data.SqlClient,philipcpresley/FSharp.Data.SqlClient,Overlord-Zurg/FSharp.Data.SqlClient,Overlord-Zurg/FSharp.Data.SqlClient,vikranthc/FSharp.Data.SqlClient,vikranthc/FSharp.Data.SqlClient