Check whether key appears in the database.
            
    Namespace: 
   BerkeleyDBAssembly: libdb_dotnet53 (in libdb_dotnet53.dll) Version: 5.3.28.0
 Syntax
Syntax
| C# | 
|---|
| public bool Exists( DatabaseEntry key ) | 
| Visual Basic (Declaration) | 
|---|
| Public Function Exists ( _ key As DatabaseEntry _ ) As Boolean | 
| Visual C++ | 
|---|
| public: bool Exists( DatabaseEntry^ key ) | 
Parameters
- key
- Type: BerkeleyDB..::.DatabaseEntry
 The key to search for.
Return Value
True if key appears in the database, false otherwise. Remarks
Remarks
            If the operation occurs in a transactional database, the operation
            will be implicitly transaction protected.
            
 Exceptions
Exceptions
| Exception | Condition | 
|---|---|
| BerkeleyDB..::.NotFoundException | A NotFoundException is thrown if key is not in the database. | 
| BerkeleyDB..::.KeyEmptyException | A KeyEmptyException is thrown if the database is a QueueDatabase or RecnoDatabase database and key exists, but was never explicitly created by the application or was later deleted. | 





