Difference between DbNull.Value and DbNull.Value.ToString()

Question

I wanted to learn which usage is true?

if(!string.IsNullOrEmpty(parentID))
   cmd.Parameters.Add(new SqlParameter(\"@ParentSesID\", parentID));
else
   cmd.Param         


        

Answer 1

DBNull.Value.ToString() will return empty string, so I think

cmd.Parameters.Add(new SqlParameter("@ParentSesID", DBNull.Value));

is a good approach and here the only approach

see here:

http://ideone.com/iGo1Jh