What would be the best way to implement change tracking on an object

Question

I have a class which contains 5 properties.

If any value is assingned to any of these fields, an another value (for example IsDIrty) would change to true.

public class Class1 {     bool IsDIrty {get;set;}      string Prop1 {get;set;}     string Prop2 {get;set;}     string Prop3 {get;set;}     string Prop4 {get;set;}     string Prop5 {get;set;} } 

Answer 1

To do this you can't really use automatic getter & setters, and you need to set IsDirty in each setter.

I generally have a "setProperty" generic method that takes a ref parameter, the property name and the new value. I call this in the setter, allows a single point where I can set isDirty and raise Change notification events e.g.

protected bool SetProperty<T>(string name, ref T oldValue, T newValue) where T : System.IComparable<T>     {         if (oldValue == null || oldValue.CompareTo(newValue) != 0)         {             oldValue = newValue;             PropertyChanged?.Invoke(this, new System.ComponentModel.PropertyChangedEventArgs(name));             isDirty = true;             return true;         }         return false;     } // For nullable types protected void SetProperty<T>(string name, ref Nullable<T> oldValue, Nullable<T> newValue) where T : struct, System.IComparable<T> {     if (oldValue.HasValue != newValue.HasValue || (newValue.HasValue && oldValue.Value.CompareTo(newValue.Value) != 0))     {         oldValue = newValue;         PropertyChanged?.Invoke(this, new System.ComponentModel.PropertyChangedEventArgs(name));     } }