add project ChainOfResponsibility

ChainOfResponsibility/ChainOfResponsibility.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

ChainOfResponsibility/Classes/Domin/Customer.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChainOfResponsibility.Classes.Domin;
+
+public class CustomerModel
+{
+    public string Name { get; set; }
+    public string Account { get; set; }
+    public string Address { get; set; }
+    public string Number { get; set; }
+
+
+}
+

ChainOfResponsibility/Classes/Service/CustomerAddressValid.cs

@@ -0,0 +1,17 @@
+using ChainOfResponsibility.Classes.Domin;
+using ChainOfResponsibility.Classes.interfaces;
+
+namespace ChainOfResponsibility.Classes.Service;
+
+
+public class CustomerAddressValid : AbstractHandler
+{
+    public override object Handle(object request)
+    {
+        CustomerModel vm = (CustomerModel)request;
+
+        if (vm.Address.Split(",").Count() != 3)
+            return $"Address is not valid";
+        return base.Handle(request);
+    }
+}

ChainOfResponsibility/Classes/Service/CustomerNameValid.cs

@@ -0,0 +1,17 @@
+using ChainOfResponsibility.Classes.Domin;
+using ChainOfResponsibility.Classes.interfaces;
+
+namespace ChainOfResponsibility.Classes.Service;
+
+
+public class CustomerNameValid : AbstractHandler
+{
+    public override object Handle(object request)
+    {
+        CustomerModel vm = (CustomerModel)request;
+
+        if (vm.Name.Length < 10)
+            return $"Name is not valid";
+        return base.Handle(request);
+    }
+}

ChainOfResponsibility/Classes/Service/CustomerNumberValid.cs

@@ -0,0 +1,17 @@
+using ChainOfResponsibility.Classes.Domin;
+using ChainOfResponsibility.Classes.interfaces;
+
+namespace ChainOfResponsibility.Classes.Service;
+
+
+public class CustomerNumberValid : AbstractHandler
+{
+    public override object Handle(object request)
+    {
+        CustomerModel vm = (CustomerModel)request;
+
+        if (vm.Number.Length == 10)
+            return $"number is not valid";
+        return base.Handle(request);
+    }
+}

ChainOfResponsibility/Classes/interfaces/AbstractHandler.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.ConstrainedExecution;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChainOfResponsibility.Classes.interfaces;
+
+public abstract class AbstractHandler : IHandler
+{
+    private IHandler NextHandler;
+    public virtual object Handle(object request) => (NextHandler?.Handle(request));
+
+
+
+
+    public IHandler SetNext(IHandler next)
+    {
+        NextHandler = next;
+        return next;
+    }
+}
+
+

ChainOfResponsibility/Classes/interfaces/IHandler.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChainOfResponsibility.Classes.interfaces;
+
+public interface IHandler
+{
+    IHandler SetNext(IHandler handler);
+    object Handle(object request);
+}

ChainOfResponsibility/Program.cs

@@ -0,0 +1,14 @@
+using ChainOfResponsibility.Classes.Domin;
+using ChainOfResponsibility.Classes.Service;
+
+CustomerModel Customervm = new CustomerModel() { Number = "123", Name = "test4", Address = "tehran,shariati,12", Account = "123" };
+
+
+CustomerNameValid _CustomerNameValidHandler = new CustomerNameValid();
+CustomerNumberValid _CustomerNumberValidHandler = new CustomerNumberValid();
+CustomerAddressValid _CustomerAddressValidHandler = new CustomerAddressValid();
+
+
+_CustomerNameValidHandler.SetNext(_CustomerNumberValidHandler).SetNext(_CustomerAddressValidHandler);
+
+var finalMessage = _CustomerNameValidHandler.Handle(Customervm);

ChainOfResponsibility/Readme.md

@@ -0,0 +1,25 @@
+the Chain of Responsibility relies on transforming particular behaviors into stand-alone objects called handlers. 
+In our case, each check should be extracted to its own class with a single method that performs the check. 
+The request, along with its data, is passed to this method as an argument.
+
+The pattern suggests that you link these handlers into a chain. 
+Each linked handler has a field for storing a reference to the next handler in the chain. 
+In addition to processing a request, handlers pass the request further along the chain.
+The request travels along the chain until all handlers have had a chance to process it.
+
+Here’s the best part: a handler can decide not to pass the request further down the chain and effectively stop any further processing.
+
+In our example with ordering systems, a handler performs the processing and then decides whether to pass the request further down the chain. 
+Assuming the request contains the right data, all the handlers can execute their primary behavior, whether it’s authentication checks or caching.
+
+
+----
+
+Chain of Responsibility and Decorator have very similar class structures. 
+Both patterns rely on recursive composition to pass the execution through a series of objects. However, there are several crucial differences.
+
+The CoR handlers can execute arbitrary operations independently of each other. 
+They can also stop passing the request further at any point. 
+On the other hand, various Decorators can extend the object’s behavior while keeping it consistent with the base interface.
+In addition, decorators aren’t allowed to break the flow of the request.
+

Command/Command.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Command/Program.cs

@@ -0,0 +1,2 @@
+// See https://aka.ms/new-console-template for more information
+Console.WriteLine("Hello, World!");

Decorator/Decorator.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Decorator/Program.cs

@@ -0,0 +1,2 @@
+// See https://aka.ms/new-console-template for more information
+Console.WriteLine("Hello, World!");

Decorator/Readme.md

@@ -0,0 +1,16 @@
+Extending a class is the first thing that comes to mind when you need to alter an object’s behavior. 
+However, inheritance has several serious caveats that you need to be aware of.
+
+Inheritance is static. You can’t alter the behavior of an existing object at runtime. 
+You can only replace the whole object with another one that’s created from a different subclass.
+Subclasses can have just one parent class. 
+In most languages, inheritance doesn’t let a class inherit behaviors of multiple classes at the same time.
+One of the ways to overcome these caveats is by using Aggregation or Composition  instead of Inheritance. 
+Both of the alternatives work almost the same way: 
+one object has a reference to another and delegates it some work, whereas with inheritance, 
+the object itself is able to do that work, inheriting the behavior from its superclass.
+
+With this new approach you can easily substitute the linked “helper” object with another, changing the behavior of the container at runtime. 
+An object can use the behavior of various classes, having references to multiple objects and delegating them all kinds of work. 
+Aggregation/composition is the key principle behind many design patterns, including Decorator. On that note, let’s return to the pattern discussion.
+

DesginPattern.sln

@@ -13,7 +13,25 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Adapter", "Adapter\Adapter.
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Builder", "Builder\Builder.csproj", "{23D56DE8-87D7-4DCD-BAA8-AC7E955582E8}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Bridge", "Bridge\Bridge.csproj", "{7EB57B4F-E7DA-44BF-8EE6-9C1DCCA8A02F}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Bridge", "Bridge\Bridge.csproj", "{7EB57B4F-E7DA-44BF-8EE6-9C1DCCA8A02F}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Facade", "Facade\Facade.csproj", "{721D7EA4-7733-415D-A147-DA644EC7F37F}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Proxy", "Proxy\Proxy.csproj", "{3F1E651B-4A8E-4623-9878-E592CA9C5F91}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ChainOfResponsibility", "ChainOfResponsibility\ChainOfResponsibility.csproj", "{580EC1A8-8419-4EB7-B031-02F326B96C35}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Decorator", "Decorator\Decorator.csproj", "{1245B922-DF1F-4763-A458-48BE5A8DB6EB}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Visitor", "Visitor\Visitor.csproj", "{2C4A0711-D6D6-4289-8D61-51F92A799D76}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Strategy", "Strategy\Strategy.csproj", "{9B0BEB4B-5B27-45CB-AC57-F54E61A34E3B}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Observer", "Observer\Observer.csproj", "{4742A01F-76C9-436E-B5E2-4D783A11B195}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Flyweight", "Flyweight\Flyweight.csproj", "{D8A2CDFB-D00B-4B4B-A810-26B9037CE506}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Command", "Command\Command.csproj", "{B0FC2B5A-711E-4EDE-ADBF-78C64CD2C357}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -45,6 +63,42 @@ Global
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 		{7EB57B4F-E7DA-44BF-8EE6-9C1DCCA8A02F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{721D7EA4-7733-415D-A147-DA644EC7F37F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{721D7EA4-7733-415D-A147-DA644EC7F37F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{721D7EA4-7733-415D-A147-DA644EC7F37F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{721D7EA4-7733-415D-A147-DA644EC7F37F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3F1E651B-4A8E-4623-9878-E592CA9C5F91}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3F1E651B-4A8E-4623-9878-E592CA9C5F91}.Debug|Any CPU.Build.0 = Debug|Any CPU
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+		{580EC1A8-8419-4EB7-B031-02F326B96C35}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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+		{2C4A0711-D6D6-4289-8D61-51F92A799D76}.Release|Any CPU.Build.0 = Release|Any CPU
+		{9B0BEB4B-5B27-45CB-AC57-F54E61A34E3B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9B0BEB4B-5B27-45CB-AC57-F54E61A34E3B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9B0BEB4B-5B27-45CB-AC57-F54E61A34E3B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9B0BEB4B-5B27-45CB-AC57-F54E61A34E3B}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4742A01F-76C9-436E-B5E2-4D783A11B195}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4742A01F-76C9-436E-B5E2-4D783A11B195}.Debug|Any CPU.Build.0 = Debug|Any CPU
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+		{4742A01F-76C9-436E-B5E2-4D783A11B195}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D8A2CDFB-D00B-4B4B-A810-26B9037CE506}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D8A2CDFB-D00B-4B4B-A810-26B9037CE506}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D8A2CDFB-D00B-4B4B-A810-26B9037CE506}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D8A2CDFB-D00B-4B4B-A810-26B9037CE506}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B0FC2B5A-711E-4EDE-ADBF-78C64CD2C357}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B0FC2B5A-711E-4EDE-ADBF-78C64CD2C357}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B0FC2B5A-711E-4EDE-ADBF-78C64CD2C357}.Release|Any CPU.ActiveCfg = Release|Any CPU
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 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

Facade/Facade.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Facade/Program.cs

@@ -0,0 +1,2 @@
+// See https://aka.ms/new-console-template for more information
+Console.WriteLine("Hello, World!");

Facade/Readme.md

@@ -0,0 +1,7 @@
+A facade is a class that provides a simple interface to a complex subsystem which contains lots of moving parts. 
+A facade might provide limited functionality in comparison to working with the subsystem directly. 
+However, it includes only those features that clients really care about.
+
+Having a facade is handy when you need to integrate your app with a sophisticated library that has dozens of features, 
+but you just need a tiny bit of its functionality.
+

Flyweight/Flyweight.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Flyweight/Program.cs

@@ -0,0 +1,2 @@
+// See https://aka.ms/new-console-template for more information
+Console.WriteLine("Hello, World!");

Observer/Observer.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Observer/Program.cs

@@ -0,0 +1,2 @@
+// See https://aka.ms/new-console-template for more information
+Console.WriteLine("Hello, World!");

Proxy/Program.cs

@@ -0,0 +1,2 @@
+// See https://aka.ms/new-console-template for more information
+Console.WriteLine("Hello, World!");

Proxy/Proxy.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Strategy/Program.cs

@@ -0,0 +1,2 @@
+// See https://aka.ms/new-console-template for more information
+Console.WriteLine("Hello, World!");

Strategy/Strategy.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Visitor/Program.cs

@@ -0,0 +1,2 @@
+// See https://aka.ms/new-console-template for more information
+Console.WriteLine("Hello, World!");

Visitor/Readme.md

@@ -0,0 +1,6 @@
+The Visitor pattern suggests that you place the new behavior into a separate class called visitor,instead of trying to integrate it into existing classes.
+The original object that had to perform the behavior is now passed to one of the visitor’s methods as an argument, 
+providing the method access to all necessary data contained within the object.
+
+Now, what if that behavior can be executed over objects of different classes?
+https://www.dntips.ir/post/2373/%d8%a7%d9%84%da%af%d9%88%db%8c-%d8%a8%d8%a7%d8%b2%d8%af%db%8c%d8%af%da%a9%d9%86%d9%86%d8%af%d9%87-visitor-pattern

Visitor/Visitor.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>