Error Call CallbackManager.OnActivityResult(requestCode, (int)resultCode, data)

Error detail :
Unhandled Exception:

System.NotSupportedException: Unable to activate instance of type PinCard.Mobile.Droid.Plugins.FacebookProvider_Android from native handle 0xfff3f75c (key_handle 0xce11d20). occurred

How to do resolve this issue ???
MainActivity.cs

    protected override void OnCreate(Bundle savedInstanceState)
        {
        base.OnCreate(savedInstanceState);
        FacebookSdk.ApplicationId = GetString(Resource.String.facebook_app_id);
                FacebookSdk.SdkInitialize(ApplicationContext);
        .......
    }
    protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
        {
            if (FacebookProvider_Android.Current != null)
            {
                var result = false;
                try
                {
            //Error Here
                    **result = FacebookProvider_Android.Current.CallbackManager.OnActivityResult(requestCode, (int)resultCode, data);**
                    if (result)
                        FacebookProvider_Android.Current.OnSuccess(result);
                }
                catch (Exception ex)
                {
                    //Do SomeThing
                }

            }
            if (GoogleProvider_Android.Current != null)
                GoogleProvider_Android.Current.OnActivityResult(requestCode, (int)resultCode, data);
            base.OnActivityResult(requestCode, resultCode, data);
            InAppBillingImplementation.HandleActivityResult(requestCode, resultCode, data);
        }

FacebookProvider_Android.cs

    [assembly: Dependency(typeof(FacebookProvider_Android))]
    namespace PinCard.Mobile.Droid.Plugins
    {
        public class FacebookProvider_Android : Java.Lang.Object, IFacebookCallback, IFacebookProvider
        {
            private TaskCompletionSource<string> _tcs;
            public FacebookProvider_Android()
            {
                CallbackManager = CallbackManagerFactory.Create();
                LoginManager.Instance.RegisterCallback(CallbackManager, this);
                Current = this;
            }
            public static FacebookProvider_Android Current { get; private set; }
            public ICallbackManager CallbackManager { get; set; }
            public bool IsProcess { get; set; }
            public void OnCancel()
            {
                _tcs.TrySetResult("");
            }
            public void OnError(FacebookException error)
            {
                _tcs.TrySetResult("");
            }
            public void OnSuccess(Java.Lang.Object result)
            {
                if (result is LoginResult lr)
                {
                    AccessToken = lr.AccessToken.Token;
                    UserId = lr.AccessToken.UserId;
                }
                _tcs.TrySetResult(AccessToken);
            }
        public string UserId { get; private set; } // Implement from Interface
            public string AccessToken { get; private set; } // Implement from Interface

            public IntPtr Handle { get; set; } //=> throw new NotImplementedException();

            public Task<string> LoginAsync() // Implement from Interface
            {
                try
                {
                    string[] scopes = { "email", "public_profile", "user_friends" };
                    if (IsProcess)
                        return Task.FromResult("");
                    _tcs = new TaskCompletionSource<string>();
                    IsProcess = true;
                    LoginManager.Instance.LogInWithReadPermissions(
                        CrossCurrentActivity.Current.Activity, scopes);
                    return _tcs.Task;
                }
                catch (System.Exception)
                {
                    //TODO: Log                
                }
                finally
                {
                    IsProcess = false;
                }
                return Task.FromResult("");
            }

            public void Dispose()
            {

            }
        }
    }

LoginPage.cs

     private async Task SignInAsync(string provider)
     {
                IAuthenticationProvider authProvider;
                switch (provider)
                {
                    case "Facebook":
                        authProvider = DependencyService.Get<IFacebookProvider>();
                        break;
                    case "Google":
                        authProvider = DependencyService.Get<IGoogleProvider>();
                        break;
                    default:
                        authProvider = DependencyService.Get<IAuthenticationProvider>();
                        break;
                }
     }

Thanks All.