Set the cursor to refer to the first key/data pair of the database, 
            and store the secondary key along with the corresponding primary
            key/data pair in Current. If the first key has
            duplicate values, the first data item in the set of duplicates is
            stored in Current.
            
    Namespace: 
   BerkeleyDBAssembly: libdb_dotnet53 (in libdb_dotnet53.dll) Version: 5.3.21.0
Syntax
| C# | 
|---|
public bool MoveFirst()  | 
| Visual Basic (Declaration) | 
|---|
Public Function MoveFirst As Boolean  | 
| Visual C++ | 
|---|
public: bool MoveFirst()  | 
Return Value
True if the cursor was positioned successfully, false otherwise.
Remarks
            If positioning the cursor fails, Current will contain
            an empty KeyValuePair<(Of <(TKey, TValue>)>).