Xamarin和android对媒体和照片的权限-应用程序在发布模式下崩溃

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

const int RequestStoragePermissionCode = 1;

if (ContextCompat.CheckSelfPermission(this, Manifest.Permission.ReadExternalStorage) != Permission.Granted ||
    ContextCompat.CheckSelfPermission(this, Manifest.Permission.WriteExternalStorage) != Permission.Granted)
{
    ActivityCompat.RequestPermissions(this, new string[] { Manifest.Permission.ReadExternalStorage, Manifest.Permission.WriteExternalStorage }, RequestStoragePermissionCode);
}

public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Permission[] grantResults)
{
    switch (requestCode)
    {
        case RequestStoragePermissionCode:
            {
                if (grantResults.Length > 0 && grantResults[0] == Permission.Granted)
                {
                    // 权限已授予，可以访问媒体和照片
                }
                else
                {
                    // 权限被拒绝，无法访问媒体和照片
                }
                return;
            }
    }
}