Clone derived class from base class method

Question

I have an abstract base class Base which has some common properties, and many derived ones which implement different logic but rarely have additional fields.

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Answer 1

Just override the Clone and have another method to CreateInstance then do your stuff.

This way you could have only Base class avoiding generics.

public Base
{
    protected int field1;
    protected int field2;
    ....

    protected Base() { ... }

    public virtual Base Clone() 
    { 
        var bc = CreateInstanceForClone();
        bc.field1 = 1;
        bc.field2 = 2;
        return bc;
    }

    protected virtual Base CreateInstanceForClone()
    {
        return new Base(); 
    }
}


public A : Base 
{     
    protected int fieldInA;
    public override Base Clone() 
    { 
        var a = (A)base.Clone();
        a.fieldInA =5;
        return a;
    }

    protected override Base CreateInstanceForClone()
    {
        return new A(); 
    }
}