C# UWP AudioDeviceInputNode AccessDenied

<Capabilities>
    <Capability Name="internetClient" />
    <DeviceCapability Name="microphone" />
</Capabilities>

using Windows.Media.Devices;
using Windows.Storage.Streams;
using System.Threading.Tasks;

public async Task InitializeAudioDevice()
{
    try
    {
        // 请求访问麦克风
        var microphone = await MediaDevices.GetDefaultAudioCaptureDeviceAsync();
        if (microphone != null)
        {
            // 成功获取麦克风设备
            // 进一步处理音频设备输入节点
        }
        else
        {
            // 处理无法获取麦克风设备的情况
        }
    }
    catch (UnauthorizedAccessException ex)
    {
        // 处理访问被拒绝的情况
        // 提示用户授予麦克风权限
    }
    catch (Exception ex)
    {
        // 处理其他异常
    }
}

using Windows.Media.Audio;
using System.Threading.Tasks;

public async Task InitializeAudioGraph()
{
    try
    {
        var settings = new AudioGraphSettings(AudioRenderCategory.Speech);
        var graph = await AudioGraph.CreateAsync(settings);
        // 进一步处理音频图
    }
    catch (UnauthorizedAccessException ex)
    {
        // 处理访问被拒绝的情况
        // 提示用户授予麦克风权限
    }
    catch (Exception ex)
    {
        // 处理其他异常
    }
}