From task Run get return value - getting return value from task Run

problem ：

I have the following code: I have the following code ：

public static async Task<string> Start(IProgress<ProcessTaskAsyncExProgress> progress){    const int total = 10;    for (var i = 0; i <= total; i++)    {        await Task.Run(() => RunLongTask(i.ToString(CultureInfo.InvariantCulture)));        if (progress != null)        {            var args = new ProcessTaskAsyncExProgress            {                ProgressPercentage = (int)(i / (double)total * 100.0),                Text = "processing " + i            };            progress.Report(args);        }    }    return "Done";}private static string RunLongTask(string taskName){    Task.Delay(300);    return taskName + "Completed!";}

How do I get back the string value of RunLongTask from this line: await Task.Run(() => RunLongTask(i.ToString(CultureInfo.InvariantCulture))); How to start from this line RunLongTask The string value of ： await Task.Run(() => RunLongTask(i.ToString(CultureInfo.InvariantCulture)));??

I've tried: I tried ：

var val = await Task.Run(() => RunLongTask(i.ToString(CultureInfo.InvariantCulture))).Result;

But I get an error saying "string is not awaitable". But I received an error message , say “ String cannot wait ”.

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Solution ：

Reference resources ： https://stackoom.com/en/question/1DjqW