Initial commit.

MQTT.NET.Core/DictionaryExtensions.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+
+namespace MQTTnet.Core
+{
+    public static class DictionaryExtensions
+    {
+        public static TValue Take<TKey, TValue>(this IDictionary<TKey, TValue> dictionary, TKey key)
+        {
+            if (dictionary == null) throw new ArgumentNullException(nameof(dictionary));
+
+            TValue value;
+            if (dictionary.TryGetValue(key, out value))
+            {
+                dictionary.Remove(key);
+            }
+
+            return value;
+        }
+    }
+}