IRegion TKey, TValue  IsReadOnly Property Pivotal GemFire .NET Client Documentation
This property throws NotImplementedException when called by both local and distributed region instances.

Namespace: GemStone.GemFire.Cache.Generic
Assembly: GemStone.GemFire.Cache (in GemStone.GemFire.Cache.dll) Version: 8.1.0.0
Syntax

bool IsReadOnly { get; }
See Also