// Implement copying fields in a private non-virtual method, called from more than one place.
private void copyFrom(Derived1 other) // Other could be null, so check for nullness.
{
if (other != null)
{
this.StringValue = other.StringValue;
}
}
// Equality check.
public override bool Equals(object obj)
{
if (object.ReferenceEquals(this, obj))
{
return(true);
}
if (!base.Equals(obj))
{
return(false);
}
Derived1 other = (Derived1)obj; // This must succeed because if the types are different, base.Equals() returns false.
return(this.StringValue == other.StringValue);
}
// Protected copy constructor. Used to implement Clone().
// Also called by a derived class' copy constructor.
protected Derived1(Derived1 other) : base(other)
{
this.copyFrom(other);
}