using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.Threading;
using?System.Threading.Tasks;

namespace?asyncAndawait
{
????class?Program
????{
????????static?void?Main（string[]?args）
????????{
????????????Console.WriteLine（“我是主線程，線程ID：{0}“?Thread.CurrentThread.ManagedThreadId）;
????????????TestAsync（）;
????????????Console.ReadLine（）;
????????}

?????????static?async?Task?TestAsync（）
????????{
????????????Console.WriteLine（“調用GetReturnResult（）之前，線程ID：{0}。當前時間：{1}“?Thread.CurrentThread.ManagedThreadId?DateTime.Now.ToString（“yyyy-MM-dd?hh:MM:ss“））;
????????????var?name?=?GetReturnResult（）;
????????????//var?ss=name.GetAwaiter（）;
????????????Console.WriteLine（“調用GetReturnResult（）之后，線程ID：{0}。當前時間：{1}“?Thread.CurrentThread.ManagedThreadId?DateTime.Now.ToString（“yyyy-MM-dd?hh:MM:ss“））;
????????????Console.WriteLine（“此時的?name?的類型是?{0}{1}“?name?DateTime.Now.ToString（））;
????????????Console.WriteLine（“下面準備調用?await?name“）;
????????????Console.WriteLine（“得到GetReturnResult（）方法的結果：{0}。當前時間：{1}“await??name?DateTime.Now.ToString（“yyyy-MM-dd?hh:MM:ss“））;
????????}

????????static?async?Task?GetReturnResult（）
????????{
????????????Console.WriteLine（“執行Task.Run之前?線程ID：{0}“?Thread.CurrentThread.ManagedThreadId）;
????????????return?await?Task.Run（（）?=>
????????????{
????????????????Thread.Sleep（3000）;
????????????????Console.WriteLine（“GetReturnResult（）方法里面線程ID:?{0}“?Thread.CurrentThread.ManagedThreadId）;
????????????????return?“我是返回值“;
????????????}）;
????????}
????}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2020-10-16?11:22??asyncAndawait2\
?????目錄???????????0??2020-10-16?11:22??asyncAndawait2\asyncAndawait\
?????目錄???????????0??2018-08-06?14:12??asyncAndawait2\asyncAndawait\.vs\
?????目錄???????????0??2018-08-06?14:12??asyncAndawait2\asyncAndawait\.vs\asyncAndawait\
?????目錄???????????0??2018-08-06?14:12??asyncAndawait2\asyncAndawait\.vs\asyncAndawait\v15\
?????文件???????46592??2018-08-30?19:24??asyncAndawait2\asyncAndawait\.vs\asyncAndawait\v15\.suo
?????目錄???????????0??2018-08-06?14:12??asyncAndawait2\asyncAndawait\.vs\asyncAndawait\v15\Server\
?????目錄???????????0??2018-08-22?14:26??asyncAndawait2\asyncAndawait\.vs\asyncAndawait\v15\Server\sqlite3\
?????文件???????????0??2018-08-06?14:12??asyncAndawait2\asyncAndawait\.vs\asyncAndawait\v15\Server\sqlite3\db.lock
?????文件??????450560??2018-08-22?14:26??asyncAndawait2\asyncAndawait\.vs\asyncAndawait\v15\Server\sqlite3\storage.ide
?????目錄???????????0??2018-08-21?20:01??asyncAndawait2\asyncAndawait\asyncAndawait\
?????文件?????????167??2020-10-16?11:22??asyncAndawait2\asyncAndawait\asyncAndawait\App.config
?????文件????????1751??2018-08-21?20:01??asyncAndawait2\asyncAndawait\asyncAndawait\Program.cs
?????目錄???????????0??2018-08-06?14:12??asyncAndawait2\asyncAndawait\asyncAndawait\Properties\
?????文件????????1324??2018-08-06?14:12??asyncAndawait2\asyncAndawait\asyncAndawait\Properties\AssemblyInfo.cs
?????文件????????2365??2020-10-16?11:22??asyncAndawait2\asyncAndawait\asyncAndawait\asyncAndawait.csproj
?????目錄???????????0??2018-08-06?14:12??asyncAndawait2\asyncAndawait\asyncAndawait\bin\
?????目錄???????????0??2020-10-16?11:22??asyncAndawait2\asyncAndawait\asyncAndawait\bin\Debug\
?????文件????????8192??2020-10-16?11:23??asyncAndawait2\asyncAndawait\asyncAndawait\bin\Debug\asyncAndawait.exe
?????文件?????????167??2020-10-16?11:22??asyncAndawait2\asyncAndawait\asyncAndawait\bin\Debug\asyncAndawait.exe.config
?????文件???????17920??2020-10-16?11:23??asyncAndawait2\asyncAndawait\asyncAndawait\bin\Debug\asyncAndawait.pdb
?????文件???????22984??2020-10-16?11:22??asyncAndawait2\asyncAndawait\asyncAndawait\bin\Debug\asyncAndawait.vshost.exe
?????文件?????????167??2020-10-16?11:22??asyncAndawait2\asyncAndawait\asyncAndawait\bin\Debug\asyncAndawait.vshost.exe.config
?????文件?????????490??2010-03-17?22:39??asyncAndawait2\asyncAndawait\asyncAndawait\bin\Debug\asyncAndawait.vshost.exe.manifest
?????目錄???????????0??2018-08-06?14:12??asyncAndawait2\asyncAndawait\asyncAndawait\obj\
?????目錄???????????0??2020-10-16?11:23??asyncAndawait2\asyncAndawait\asyncAndawait\obj\Debug\
?????文件????????6706??2020-10-16?11:22??asyncAndawait2\asyncAndawait\asyncAndawait\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
?????目錄???????????0??2020-10-16?13:07??asyncAndawait2\asyncAndawait\asyncAndawait\obj\Debug\TempPE\
?????文件???????????0??2018-08-06?14:12??asyncAndawait2\asyncAndawait\asyncAndawait\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs
?????文件???????????0??2018-08-06?14:12??asyncAndawait2\asyncAndawait\asyncAndawait\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs
?????文件???????????0??2018-08-06?14:12??asyncAndawait2\asyncAndawait\asyncAndawait\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs
............此處省略7個文件信息