寻找.NET 4.5 Progress T。源代码 [英] Looking for .NET 4.5 Progress<T> source code

问题描述

我没有安装.NET 4.5（并且无法安装）。

I don't have .NET 4.5 installed (and I can't install it).

在哪里可以找到新的<$ c的源代码$ c> System.Progress< T> 类？

Where can I find the source code of the new System.Progress<T> class ?

（或者足够友好的人，安装了.NET 4.5 Beta，可以复制/粘贴代码）

(Or someone kind enough, with the .NET 4.5 beta installed, to copy/paste the code)

推荐答案

以下是ILSpy的输出：

Here is the output from ILSpy:

using System;
using System.Runtime;
using System.Threading;
namespace System
{
    [__DynamicallyInvokable]
    public class Progress<T> : IProgress<T>
    {
        private readonly SynchronizationContext m_synchronizationContext;
        private readonly Action<T> m_handler;
        private readonly SendOrPostCallback m_invokeHandlers;
        [__DynamicallyInvokable]
        public event EventHandler<T> ProgressChanged
        {
            [__DynamicallyInvokable]
            add
            {
                EventHandler<T> eventHandler = this.ProgressChanged;
                EventHandler<T> eventHandler2;
                do
                {
                    eventHandler2 = eventHandler;
                    EventHandler<T> value2 = (EventHandler<T>)Delegate.Combine(eventHandler2, value);
                    eventHandler = Interlocked.CompareExchange<EventHandler<T>>(ref this.ProgressChanged, value2, eventHandler2);
                }
                while (eventHandler != eventHandler2);
            }
            [__DynamicallyInvokable]
            remove
            {
                EventHandler<T> eventHandler = this.ProgressChanged;
                EventHandler<T> eventHandler2;
                do
                {
                    eventHandler2 = eventHandler;
                    EventHandler<T> value2 = (EventHandler<T>)Delegate.Remove(eventHandler2, value);
                    eventHandler = Interlocked.CompareExchange<EventHandler<T>>(ref this.ProgressChanged, value2, eventHandler2);
                }
                while (eventHandler != eventHandler2);
            }
        }
        [__DynamicallyInvokable]
        public Progress()
        {
            this.m_synchronizationContext = (SynchronizationContext.CurrentNoFlow ?? ProgressStatics.DefaultContext);
            this.m_invokeHandlers = new SendOrPostCallback(this.InvokeHandlers);
        }
        [__DynamicallyInvokable]
        public Progress(Action<T> handler) : this()
        {
            if (handler == null)
            {
                throw new ArgumentNullException("handler");
            }
            this.m_handler = handler;
        }
        [__DynamicallyInvokable]
        protected virtual void OnReport(T value)
        {
            Action<T> handler = this.m_handler;
            EventHandler<T> progressChanged = this.ProgressChanged;
            if (handler != null || progressChanged != null)
            {
                this.m_synchronizationContext.Post(this.m_invokeHandlers, value);
            }
        }
        [__DynamicallyInvokable, TargetedPatchingOptOut("Performance critical to inline this type of method across NGen image boundaries")]
        void IProgress<T>.Report(T value)
        {
            this.OnReport(value);
        }
        private void InvokeHandlers(object state)
        {
            T t = (T)((object)state);
            Action<T> handler = this.m_handler;
            EventHandler<T> progressChanged = this.ProgressChanged;
            if (handler != null)
            {
                handler(t);
            }
            if (progressChanged != null)
            {
                progressChanged(this, t);
            }
        }
    }
}

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