public interface IMyInterface
    {
        void DoWork();
    }

    public class MyImplementation1 : IMyInterface
    {
        public void DoWork()
        {
            var implementationName = this.GetType().ToString();
            Console.WriteLine("DoWork from " + implementationName);
        }
    }
    public class MyImplementation2 : IMyInterface
    {
        public void DoWork()
        {
            var implementationName = this.GetType().ToString();
            Console.WriteLine("DoWork from " + implementationName);
        }
    }

    public class Context
    {
        IMyInterface myInterface;

        public void Print() 
        {
            myInterface = new MyImplementation1();
            myInterface.DoWork();

            myInterface = new MyImplementation2();
            myInterface.DoWork();
        }
    }

public interface Movable
    {
        void Move();
    }
    public class EnemyBase : Movable
    {
        // Enemy properties goes here
        protected int x, y;
        public virtual void Move()
        {
            x += 2;
            y += 2;
        }
    }
    public class EnemyWithMoveType2 : EnemyBase
    {
        // override the move method
        public override void Move()
        {
            x += 4;
            y += 4;
        }
    }
    public class EnemyWithMoveType3 : EnemyBase
    {
        // override the move method
        public override void Move()
        {
            x += 6;
            y += 6;
        }
    }
    public class PlayerBase : Movable
    {
        // Player properties goes here
        protected int x, y;
        public  virtual void Move()
        {
            // same code as EnemyBase move method
            x += 2;
            y += 2;
        }
    }
    public class PlayerWithMoveType2 : PlayerBase
    {
        // override the move method
        public override void Move()
        {
            // same code as EnemyWithMoveType2 move method
            x += 4;
            y += 4;
        }
    }
    public class PlayerWithMoveType3 : PlayerBase
    {
        // override the move method
        public override void Move()
        {
            // same code as EnemyWithMoveType3 move method
            x += 6;
            y += 6;
        }
    }  
 

     public interface IMovable
    {
        void Move(ref int x, ref int y);
    }
    public class EnemyBase
    {
        // Enemy properties goes here
        protected int x, y;
        IMovable moveBehavior;
        public void SetMoveBehavior(IMovable _moveBehavior) { moveBehavior = _moveBehavior; }
        public void Move()
        {
            moveBehavior.Move(ref x,ref y);
        }
    }
    public class PlayerBase
    {
        // Player properties goes here
        protected int x, y;
        IMovable moveBehavior;
        public void SetMoveBehavior(IMovable _moveBehavior) { moveBehavior = _moveBehavior; }
        public void Move()
        {
            moveBehavior.Move(ref x, ref y);
        }
    }
    public class MoveBehavior1
    {
        public void Move(ref int x, ref int y)
        {
            x += 2;
            y += 2;
        }
    }
    public class MoveBehavior2 : IMovable
    {
        public void Move(ref int x, ref int y)
        {
            x += 4;
            y += 4;
        }
    }
    public class MoveBehavior3 : IMovable
    {
        public void Move(ref int x, ref int y)
        { 
            x += 6;
            y += 6;
        }
    }  

یک نکته‌ی تکمیلی: بهبود Null Coalescing Assignment در C# 8.0

ساده سازی انتساب مقداری به یک متغیر، اگر نال باشد:

- روش انجام اینکار تا پیش از C# 8.0

- در C# 8.0

موضوعی که من میخوام براس تو ORM راهی پیدا کنم مربوط به اینه که بتونم کلاسم رو تغییر ندم و از بتونم فیلد پرنت رو غیر نال تعریف کنم، این اسکریپت رو ببینید:

Welcome to the November 2018 release of Visual Studio Code. There are a number of significant updates in this version that we hope you will like, some of the key highlights include:

• Multiline search improvements - Easily create multiline search patterns without using regex.
• Custom title bar on Linux - The custom title and menu bar is now the default on Linux.
• References view - Find All References view includes history of recent searches.
• Snippet comment variables - Snippet variables insert correct comment per language.
• JS/TS callback display - Now you can see the context of anonymous callbacks.
• JSDoc Markdown highlighting - Including syntax highlighting for Markdown code blocks in JSDoc.
• Simplified debug configuration - Better defaults and Quick Pick UI for initial launch configuration.
• Run tasks on folder open - Configure tasks to run when you first open a project folder.
• Choose extension version - Install earlier versions of Marketplace extensions. 

Microsoft on Tuesday released fixes for 58 newly discovered security flaws spanning as many as 11 products and services as part of its final Patch Tuesday of 2020, effectively bringing their CVE total to 1,250 for the year. 

The most popular Blockchain network at this moment is Bitcoin. It is a digital currency that has no central authority. Proof of Work allows Bitcoin to maintain security and validity without a middleman, bank. However, the price is a lot of computing time, therefore a lot of electricity. 

Microsoft is planning to make Windows 10 PCs work without passwords. While the company has been working on removing passwords from Windows 10 and its Microsoft Accounts for a number of months now, the next major update to Windows 10 next year will go one step further.

When you start working on a new web application you will probably need to analyze different tools to deal with the different functionalities that you have to work on. As soon as you start searching for alternatives you are going to run across Angular and React, they are without any doubt two of the major options to consider, at least till today.