Decrements the value of a key by the delta. If the key doesn't exist, it will be created
and seeded with the defaut initial value 1.
Namespace: Couchbase.CoreAssembly: Couchbase.NetClient (in Couchbase.NetClient.dll) Version: 2.0.0.0 (2.0.0.0)

Parameters
- key
- Type: System.String
The key to us for the counter.
- delta
- Type: System.UInt64
The number to increment the key by.
- initial
- Type: System.UInt64
The initial value to use. If the key doesn't exist, this value will returned.
- expiration
- Type: System.UInt32
The time-to-live (ttl) for the counter in seconds.
Return Value
Type: IOperationResult<UInt64>If the key doesn't exist, the server will respond with the initial value. If not the decremented value will be returned.

Expirations over 30 * 24 * 60 * 60 (the amount of seconds in 30 days) are interpreted as a UNIX timestamp of the date at which the document expires.
see documentation section about expiration.
