error message with get set with timer

Question

Getting this error message with this code and I cant find anytime that make sense to fix it

1> D:\mdev\dealerpreviews\dealerpreviews\dealerpreviews\cuttingroom.xaml.cs(83,19,83,22): error CS0305: Using the generic type 'Set<TElement>' requires 1 type arguments
1> D:\mdev\dealerpreviews\dealerpreviews\dealerpreviews\cuttingroom.xaml.cs(89,19,89,22): error CS0305: Using the generic type 'Set<TElement>' requires 1 type arguments
1> D:\mdev\dealerpreviews\dealerpreviews\dealerpreviews\cuttingroom.xaml.cs(95,19,95,22): error CS0305: Using the generic type 'Set<TElement>' requires 1 type arguments

the code is

   private Timer _timer;
        private TimeSpan _totalSeconds;
        private string _time;
        private string _time2;

        public TimeSpan TotalSeconds
        {
            get { return _totalSeconds; }
            set { Set( ref _totalSeconds, value); }
        }

        public string Time
        {
            get { return _time; }
            set { Set(ref _time, value); }
        }

        public string Time2
        {
            get { return _time2; }
            set { Set(ref _time2, value); }
        }

Answer 1

nope, same error message

 public partial class cuttingroom : ContentPage
    {

        private Timer _timer;
        private TimeSpan _totalSeconds;
        private string _time;
        private string _time2;

        public TimeSpan TotalSeconds
        {
            get { return _totalSeconds; }
            set { Set( ref _totalSeconds, value); }
        }

        public string Time
        {
            get { return _time; }
            set { Set(ref _time, value); }
        }

        public string Time2
        {
            get { return _time2; }
            set { Set(ref _time2, value); }
        }






        public enum CameraCaptureMode
        {
            Default,
            Photo,
            Video
        }


        public enum CameraFlashMode
        {
            Off,
            On,
            Auto,
            Torch
        }

        employeedatadata EmpData = new employeedatadata();

        private string uRL;
        private string returnuRL;
        private string timeoffilm;
        string videobase64;
        public Command<object> CaptureCommand { get; }

        public abstract class ContentPage : System.ComponentModel.INotifyPropertyChanged
        {
            /// <summary>
            /// Multicast event for property change notifications.
            /// </summary>
            public event PropertyChangedEventHandler PropertyChanged;
            /// <summary>
            /// Checks if a property already matches the desired value.  Sets the property and
            /// notifies listeners only when necessary.
            /// </summary>
            /// <typeparam name="T">Type of the property.</typeparam>
            /// <param name="storage">Reference to a property with both getter and setter.</param>
            /// <param name="value">Desired value for the property.</param>
            /// <param name="propertyName">Name of the property used to notify listeners.This
            /// value is optional and can be provided automatically when invoked from compilers that
            /// support CallerMemberName.</param>
            /// <returns>True if the value was changed, false if the existing value matched the
            /// desired value.</returns>
            protected virtual bool Set<T>(ref T storage, T value, [System.Runtime.CompilerServices.CallerMemberName] string propertyName = null)
            {
                if (object.Equals(storage, value)) return false;
                storage = value;
                // Log.DebugFormat("{0}.{1} = {2}", this.GetType().Name, propertyName, storage);
                this.OnPropertyChanged(propertyName);
                return true;
            }
            /// <summary>
            /// Notifies listeners that a property value has changed.
            /// </summary>
            /// <param name="propertyName">Name of the property used to notify listeners.  This
            /// value is optional and can be provided automatically when invoked from compilers
            /// that support <see cref="CallerMemberNameAttribute"/>.</param>
            protected virtual void OnPropertyChanged([System.Runtime.CompilerServices.CallerMemberName] string propertyName = null)
            {
                var eventHandler = this.PropertyChanged;
                if (eventHandler != null)
                    eventHandler(this, new PropertyChangedEventArgs(propertyName));
            }
        }