我正在 try catch 异步方法中引发的自定义异常,但是由于某种原因,它总是最终被通用异常捕获块捕获。请参阅下面的示例代码

class Program
{
    static void Main(string[] args)
    {
        try
        {
            var t = Task.Run(TestAsync);
            t.Wait();
        }
        catch(CustomException)
        {
            throw;
        }
        catch (Exception)
        {
            //handle exception here
        }
    }

    static async Task TestAsync()
    {
        throw new CustomException("custom error message");
    }
}

class CustomException : Exception
{
    public CustomException()
    {
    }

    public CustomException(string message) : base(message)
    {
    }

    public CustomException(string message, Exception innerException) : base(message, innerException)
    {
    }

    protected CustomException(SerializationInfo info, StreamingContext context) : base(info, context)
    {
    }
}

最佳答案

问题是Wait抛出AggregateException,而不是您 try catch 的异常。

您可以使用此:

try
{
    var t = Task.Run(TestAsync);
    t.Wait();
}
catch (AggregateException ex) when (ex.InnerException is CustomException)
{
    throw;
}
catch (Exception)
{
    //handle exception here
}

10-04 11:05