reactive/Rx.NET/Source/System.Reactive.Linq/Reactive/Linq/Observable/_.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information. 

#if !NO_PERF
using System;

namespace System.Reactive.Linq.ObservableImpl
{
}
#endif