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Diffstat (limited to 'Rx.NET/System.Reactive.Linq/Reactive/Internal/HashSet.cs')
-rw-r--r--Rx.NET/System.Reactive.Linq/Reactive/Internal/HashSet.cs28
1 files changed, 28 insertions, 0 deletions
diff --git a/Rx.NET/System.Reactive.Linq/Reactive/Internal/HashSet.cs b/Rx.NET/System.Reactive.Linq/Reactive/Internal/HashSet.cs
new file mode 100644
index 0000000..f2a7d79
--- /dev/null
+++ b/Rx.NET/System.Reactive.Linq/Reactive/Internal/HashSet.cs
@@ -0,0 +1,28 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+#if NO_HASHSET
+using System;
+using System.Collections.Generic;
+
+namespace System.Reactive
+{
+ class HashSet<T>
+ {
+ private Dictionary<T, object> _set;
+
+ public HashSet(IEqualityComparer<T> comparer)
+ {
+ _set = new Dictionary<T, object>(comparer);
+ }
+
+ public bool Add(T value)
+ {
+ if (_set.ContainsKey(value))
+ return false;
+
+ _set[value] = null;
+ return true;
+ }
+ }
+}
+#endif \ No newline at end of file