Store the key/data pair in the database only if it does not already
            appear in the database. 
            
    Namespace: 
   BerkeleyDBAssembly: libdb_dotnet53 (in libdb_dotnet53.dll) Version: 5.3.28.0
 Syntax
Syntax
| C# | 
|---|
| public void PutNoDuplicate( DatabaseEntry key, DatabaseEntry data, Transaction txn ) | 
| Visual Basic (Declaration) | 
|---|
| Public Sub PutNoDuplicate ( _ key As DatabaseEntry, _ data As DatabaseEntry, _ txn As Transaction _ ) | 
| Visual C++ | 
|---|
| public: void PutNoDuplicate( DatabaseEntry^ key, DatabaseEntry^ data, Transaction^ txn ) | 
Parameters
- key
- Type: BerkeleyDB..::.DatabaseEntry
 The key to store in the database
- data
- Type: BerkeleyDB..::.DatabaseEntry
 The data item to store in the database
- txn
- Type: BerkeleyDB..::.Transaction
 If the operation is part of an application-specified transaction, txn is a Transaction object returned from BeginTransaction()()(); if the operation is part of a Berkeley DB Concurrent Data Store group, txn is a handle returned from BeginCDSGroup()()(); otherwise null.





