OracleParameter type inference

Question

The type inference described in section 3 of the production ODP.NET documentation (table 3.8) seems to be enforced when setting a value directly using OracleCommand.Parameters.Add(), but not when assigning OracleParameter.Value and then adding that parameter to the command. Am I missing something here?
DateTime thingDateTime = DateTime.Now;
OracleCommand cmdOne = new OracleCommand();
OracleParameter paramTemp = new OracleParameter();
cmd.Parameters.Add("one", thingDateTime);
paramTemp.ParameterName = "two";
paramTemp.Value = thingDateTime;
cmd.Parameters.Add(paramTemp);
Console.WriteLine("one - Value.GetType:{0}", cmd.Parameters["one"].Value.GetType());
Console.WriteLine("one - OracleDbType:{0}", cmd.Parameters["one"].OracleDbType.ToString());
Console.WriteLine("one - DbType:{0}", cmd.Parameters["one"].DbType.ToString());
Console.WriteLine("");
Console.WriteLine("two - Value.GetType:{0}", cmd.Parameters["two"].Value.GetType());
Console.WriteLine("two - OracleDbType:{0}", cmd.Parameters["two"].OracleDbType.ToString());
Console.WriteLine("two - DbType:{0}", cmd.Parameters["two"].DbType.ToString());
Console.WriteLine("");
Console.WriteLine("temp - Value.GetType:{0}", paramTemp.Value.GetType());
Console.WriteLine("temp - OracleDbType:{0}", paramTemp.OracleDbType.ToString());
Console.WriteLine("temp - DbType:{0}", paramTemp.DbType.ToString());
Result:
one - Value.GetType:System.DateTime
one - OracleDbType:TimeStamp
one - DbType:DateTime
two - Value.GetType:System.DateTime
two - OracleDbType:Varchar2
two - DbType:String
temp - Value.GetType:System.DateTime
temp - OracleDbType:Varchar2
temp - DbType:String

Answer 1

This issue has been identified as a bug in the production release and would be fixed in the next version.