protected override void OnNotifyPropertyChanged(string propertyName)
        {
            if (propertyName == "AutoSize")
            {
                if (!this.AutoSize)
                {
                    this.RootElement.StretchHorizontally = true;
                    this.RootElement.StretchVertically = true;
                }
                else
                {
                    this.RootElement.StretchHorizontally = false;
                    this.RootElement.StretchVertically = false;
                }
            }
        }

        /// <summary>
        /// Raises the PropertyChanged event
        /// </summary>
        /// <param name="propertyName">The name of the property</param>
        protected virtual void OnNotifyPropertyChanged(string propertyName)
        {
            this.OnNotifyPropertyChanged(new PropertyChangedEventArgs(propertyName));
        }

        protected virtual void OnNotifyPropertyChanged(PropertyChangedEventArgs e)
        {
            PropertyChangedEventHandler handler1 =
                (PropertyChangedEventHandler)this.Events[RadControl.PropertyChangedEventKey];
            if (handler1 != null)
            {
                handler1(this, e);
            }
        }

RadGridView grid = new RadGridView();
grid.OnNotifyPropertyChanged("mypropertyname");

RadGridView grid = new RadGridView();
grid.OnNotifyPropertyChanged(new PropertyChangedEventArgs("mypropertyname"));