Partial Purge Support

src/DurableTask.Core/PurgeResult.cs

@@ -27,9 +27,28 @@ public PurgeResult(int deletedInstanceCount)
             this.DeletedInstanceCount = deletedInstanceCount;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PurgeResult" /> class.
+        /// </summary>
+        /// <param name="deletedInstanceCount">The number of instances deleted.</param>
+        /// <param name="isComplete">A value indicating whether the purge operation is complete. 
+        /// If true, the purge operation is complete. All instances were purged.
+        /// If false, not all instances were purged. Please purge again.
+        /// If null, whether or not all instances were purged is undefined.</param>
+        public PurgeResult(int deletedInstanceCount, bool? isComplete)
+        {
+            this.DeletedInstanceCount = deletedInstanceCount;
+            this.IsComplete = isComplete;
+        }
+
         /// <summary>
         /// Number of instances deleted during this execution of the purge operation.
         /// </summary>
         public int DeletedInstanceCount { get; }
+
+        /// <summary>
+        /// Gets a value indicating whether the purge operation is complete.
+        /// </summary>
+        public bool? IsComplete { get; }
     }
 }