A boilerplate C# implementation of INotifyPropertyChanged

BoilerplateINotifyPropertyChanged.cs

using System;
using System.ComponentModel; // For INotifyPropertyChanged interface
using System.Runtime.CompilerServices; // For CallerMemberName, could use nameof() otherwise

namespace FooProgram
{
    public class BoilerplateNotify : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;
        
        // Adapted from https://stackoverflow.com/a/36972187/1292918
        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
        
        private bool _demoProperty1 = false;
        public bool DemoProperty1
        {
            get => _demoProperty;
            set { _demoProperty = value; OnPropertyChanged(); }
        }
        
        // To use only one line for simple properties add the following
        // Adapted from https://stackoverflow.com/a/1316417/1292918
        protected bool SetField<T>(ref T field, T value, [CallerMemberName] string propertyName = null)
        {
            //if (EqualityComparer<T>.Default.Equals(filed, value)) return false;
            // or
            if (field.Equals(value) return false;
            field = value;
            OnPropertyChanged(propertyName);
            return true;
        }
        
        private string _demoProperty2;
        public string DemoProperty2
        {
            get => _demoProperty;
            set => SetField(ref _demoProperty2, value);
        }
    }
}