using System;

public class Program

{

    public static void Main()

    {

        var class1 = new Class1();

        var class2 = new Class2();

        LogChangesAndSave(class1);

        LogChangesAndSave(class2);

    }

    public static void LogChangesAndSave(ISaveable saveable)

    {

        Console.WriteLine("Saving changes to: " + saveable.ToString()); 

        saveable.Save();

    }

}

​

public interface ISaveable

{

    void Save();    

}

​

public class Class1 : ISaveable

{

    public void Save()

    {

        //saves all the class1 properties

    }

}

​

public class Class2 : ISaveable

{

    public void Save()

    {

        //saves all the class2 properties

    }

}