c# - 使用Windows.Storage命名空间时出错

我正在尝试将字符串保存到我的临时文件夹中的文本文件中，但是出现此错误：

Error2'await' requires that the type 'Windows.Foundation.IAsyncAction' have a
suitable GetAwaiter method. Are you missing a using directive for 'System'

谢谢

附言这是C＃控制台应用程序。

我的代码：

using System;
using System.IO;
using System.Linq;
using Windows.Storage;

public static class Storage
{

    public static async void SaveData()
    {
        string myString = "This is the data I want to save";
        ApplicationDataContainer localSettings = ApplicationData.Current.LocalSettings;

        // Add:  using Windows.Storage;
        Windows.Storage.StorageFolder localFolder = Windows.Storage.ApplicationData.Current.TemporaryFolder;

        // Optionally overwrite any existing file with CreationCollisionOption
        StorageFile file = await localFolder.CreateFileAsync("mySaveFile.txt", CreationCollisionOption.ReplaceExisting);

        try
        {
            if (file != null)
            {
                await FileIO.WriteTextAsync(file, myString);
            }
        }
        catch (FileNotFoundException)
        {
            // Error saving data
        }
    }

}

最佳答案

那是因为您缺少一个.dll
添加对此程序集的引用：
C：\ Program Files（x86）\ Reference Assembly \ Microsoft \ Framework.NETCore \ v4.5.1 \ System.Runtime.WindowsRuntime.dll

这对于桌面应用程序使用WinRT API的扩展方法“ GetAwaiter”是必要的。