.NET 8 WPF中异步调用第三方库出现无限阻塞问题求助

在基于.NET 8.0的WPF应用中，调用第三方库的异步操作时出现如下问题：将代码放在MainWindow.xaml.cs中运行流畅，但移至带有静态构造函数的独立类后，即便使用WaitAsync，操作仍会无限阻塞。

原阻塞代码 #

public class VirtuosoCommunication
{
    // ... 其他代码
    public static VirtuosoCommunication? Create(...)
    {
        VirtuosoCommunication vc = new VirtuosoCommunication();
        // 初始化vc的私有变量

        if (!vc.TestRead(log)) return null;
        if (!vc.TestWrite(log)) return null;

        return vc;
    }

    private bool TestRead(Log? log)
    {
        string testGraph = "...";
        Task<Graph?> task = LoadGraphFromSparqlRemoteEndpoint(testGraph, log);
            
        Graph? g = task.Result;
        return g != null;
    }

    internal async Task<Graph?> LoadGraphFromSparqlRemoteEndpoint(string graphFullName, Log? log)
    {
        Uri baseUri = new Uri(_readEndpoint ?? "");

        HttpClient client = new HttpClient();
        client.BaseAddress = baseUri;

        SparqlQueryClient sparqlQueryClient = new SparqlQueryClient(client, baseUri);

        Graph result = new Graph();
        IGraph? tmp = null;
        int offSet = 0; // 假设此处有定义limit和offSet变量
        int limit = 100;

        try
        {
            while (tmp == null || tmp.Triples.Count == limit)
            {
                string query = "construct { ?s ?p ?o } FROM <" + graphFullName + "> where {?s ?p ?o.} OFFSET " + offSet.ToString() + " LIMIT " + limit.ToString();
                Task<IGraph> task = sparqlQueryClient.QueryWithResultGraphAsync(query);
                tmp = await task.WaitAsync(TimeSpan.FromSeconds(4));

                // ... 处理tmp的逻辑
                offSet += limit;
            }
        }
        catch (Exception ex) { /* 异常处理 */ }

        return result;
    }
}

调试现象 #

逐行调试时，代码卡在tmp = await task.WaitAsync处；点击Visual Studio的「中断执行」按钮后，显示线程返回时将执行TestRead方法中的Graph? g = task.Result行。

修改后的代码（2024.11.25更新） #

将TestRead方法修改为以下形式后，代码可正常运行，但不确定是否为符合需求的正确实现：

private bool TestRead(Log? log)
{
    string testGraph = "...";
    //Task<Graph?> task = LoadGraphFromSparqlRemoteEndpoint(testGraph, log);
    Task<Graph?> task = Task.Run<Graph?>(async() => await LoadGraphFromSparqlRemoteEndpoint(testGraph, log));

    Graph? g = task.Result;
    return g != null;
}

疑问 #

需求仅为SPARQL端点调用不阻塞UI，无需同时运行其他并行任务，上述修改是否为正确的实现方式？

内容的提问来源于stack exchange，提问作者Aaginor