1 files changed, 52 insertions, 0 deletions

diff --git a/Rx.NET/System.Reactive.Linq/Reactive/Linq/Observαble/Concat.cs b/Rx.NET/System.Reactive.Linq/Reactive/Linq/Observαble/Concat.cs
new file mode 100644
index 0000000..5a9b2e4
--- /dev/null
+++ b/Rx.NET/System.Reactive.Linq/Reactive/Linq/Observαble/Concat.cs
@@ -0,0 +1,52 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+#if !NO_PERF
+using System;
+using System.Collections.Generic;
+using System.Reactive.Concurrency;
+using System.Reactive.Disposables;
+
+namespace System.Reactive.Linq.Observαble
+{
+    class Concat<TSource> : Producer<TSource>, IConcatenatable<TSource>
+    {
+        private readonly IEnumerable<IObservable<TSource>> _sources;
+
+        public Concat(IEnumerable<IObservable<TSource>> sources)
+        {
+            _sources = sources;
+        }
+
+        protected override IDisposable Run(IObserver<TSource> observer, IDisposable cancel, Action<IDisposable> setSink)
+        {
+            var sink = new _(observer, cancel);
+            setSink(sink);
+            return sink.Run(_sources);
+        }
+
+        public IEnumerable<IObservable<TSource>> GetSources()
+        {
+            return _sources;
+        }
+
+        class _ : ConcatSink<TSource>
+        {
+            public _(IObserver<TSource> observer, IDisposable cancel)
+                : base(observer, cancel)
+            {
+            }
+
+            public override void OnNext(TSource value)
+            {
+                base._observer.OnNext(value);
+            }
+
+            public override void OnError(Exception error)
+            {
+                base._observer.OnError(error);
+                base.Dispose();
+            }
+        }
+    }
+}
+#endif
\ No newline at end of file