列表的一般问题

我正在尝试创建一个并行的助手类( ParallelRunner )可以像在 RequestService 班级:

public class ParallelFunction
{
    public ParallelFunction(Func<object> function)
    {
        Function = function;
    }

    public T GetResult<T>() where T : class
    {
        return (T) Data;
    }

    public Func<object> Function { get; private set; }
    public object Data { private get; set; }
}

public static class ParallelRunner
{
    public static void Run( IEnumerable<ParallelFunction> parallelFunctions)
    {
        Parallel.ForEach(parallelFunctions, f =>{f.Data = f.Function();});
    }
}


public class RequestService
{
    public void DoParallel()
    {
        var da = new RequestDataAccess();
        var pf1 = new ParallelFunction(da.GetRequests);
        var pf2 = new ParallelFunction(da.GetRequestAnswers);

        ParallelRunner.Run(new List<ParallelFunction> { pf1, pf2 });

        var requests = pf1.GetResult<List<Request>>();
        var answers = pf2.GetResult<List<RequestAnswer>>();
    }
}

public class ParallelFunction<T>  where T : class
{
    public ParallelFunction(Func<T> function)
    {
        Function = function;
    }

    public Func<T> Function { get; private set; }
    public T Data { get; set; }
}

而不是从 GetResult<T> 执行所需类型的强制转换,从 T Data 财产。

ParallelRunner.Run(new List<ParallelFunction> { pf1, pf2 });

也许有人知道怎么解决这个问题?