implemented Deconstruct using an extension method

Author: LiteObject

.vscode/launch.json

@@ -0,0 +1,26 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            // Use IntelliSense to find out which attributes exist for C# debugging
+            // Use hover for the description of the existing attributes
+            // For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md
+            "name": ".NET Core Launch (console)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            // If you have changed target frameworks, make sure to update the program path.
+            "program": "${workspaceFolder}/bin/Debug/net6.0/csharp-deconstruct.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}",
+            // For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console
+            "console": "internalConsole",
+            "stopAtEntry": false
+        },
+        {
+            "name": ".NET Core Attach",
+            "type": "coreclr",
+            "request": "attach"
+        }
+    ]
+}

.vscode/tasks.json

@@ -0,0 +1,41 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/csharp-deconstruct.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "publish",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "publish",
+                "${workspaceFolder}/csharp-deconstruct.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "watch",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "watch",
+                "run",
+                "--project",
+                "${workspaceFolder}/csharp-deconstruct.csproj"
+            ],
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

Extensions.cs

@@ -0,0 +1,8 @@
+namespace CSharp.Deconstruction.Demo
+{
+    public static class Extensions
+    {
+        public static void Deconstruct(this DateTimeOffset date, out int day, out int month, out int year) =>
+            (day, month, year) = (date.Day, date.Month, date.Year);
+    }
+}

MyBook.cs

@@ -1,27 +1,30 @@
-// declare a class with Deconstruct method(s)
-class MyBook
+namespace CSharp.Deconstruction.Demo
 {
-    public int Id {get; set;}
-    public string Title {get; set;}
-    public string Author {get; set;}
-
-    public MyBook(int id, string title, string author)
+    // declare a class with Deconstruct method(s)
+    class MyBook
     {
-        Id = id;
-        Title = title;
-        Author = author;
-    }
+        public int Id { get; set; }
+        public string Title { get; set; }
+        public string Author { get; set; }
 
-    public void Deconstruct(out int id, out string title, out string author)
-    {
-        id = Id;
-        title = Title;
-        author = Author;
-    }
+        public MyBook(int id, string title, string author)
+        {
+            Id = id;
+            Title = title;
+            Author = author;
+        }
 
-    public void Deconstruct(out string title, out string author)
-    {
-        title = Title;
-        author = Author;
+        public void Deconstruct(out int id, out string title, out string author)
+        {
+            id = Id;
+            title = Title;
+            author = Author;
+        }
+
+        public void Deconstruct(out string title, out string author)
+        {
+            title = Title;
+            author = Author;
+        }
     }
 }

Program.cs

@@ -60,8 +60,23 @@ public static void Main()
 
             // instantitate a Person record
             var person = new Person("Jon", "Doe");
+
+            // deconstruct person record
             var (firstName, lastName) = person;
             Console.WriteLine($"My name is {firstName} {lastName}");
+
+
+            /******************************************* 
+            * Example: Deconstruction using extension method 
+            *******************************************/
+
+            // implemeted an extension method in "Extensions.cs" file
+            // now instantitate DateTimeOffset
+            var date = new DateTimeOffset(2022, 9, 17, 0, 0, 0, 0, TimeSpan.Zero);
+
+            // deconstruct DateTimeOffset objcet
+            (int day, int month, int year) = date; 
+            Console.WriteLine($"I wrote this example on: {month}/{day}/{year}");
         }
     }
 }

README.md

@@ -3,7 +3,7 @@
 
 Let's learn more about this process by looking at the following code examples.
 
-## Example: Deconstruct a tuple
+## Example: Deconstruction of a tuple object 
 
 ```csharp
 // declare a tuple
@@ -19,7 +19,7 @@ Console.WriteLine($"Price: {price}");
 
 ```
 
-## Example: Deconstruct a dictionary
+## Example: Deconstruction of a dictionary object
 
 ```csharp
 // declare a dictionary object
@@ -34,7 +34,7 @@ foreach((string k, string v) in books)
     Console.WriteLine($"\"{k}\" written by {v}");
 }
 ```
-## Example: Deconstruct a class
+## Example: Deconstruction of a class
 We need to implement the `Deconstruct` method. We can have multiple implementation of this method by overloading.
 
 ```csharp
@@ -82,7 +82,7 @@ var (myBookTitle, myBookAuthor) = mybook;
 Console.WriteLine($"\"{myBookTitle}\" by {myBookAuthor}");
 ```
 
-## Example: Deconstruct a record
+## Example: Deconstruction of a record
 
 ```csharp
 // define a record called "Person" with the props
@@ -94,6 +94,24 @@ var person = new Person("Jon", "Doe");
 var (firstName, lastName) = person;
 Console.WriteLine($"My name is {firstName} {lastName}");
 ```
+
+## Example: Deconstruction using extension method 
+
+```csharp
+// implemeted an extension method
+public static void Deconstruct(this DateTimeOffset date, out int day, out int month, out int year) =>
+            (day, month, year) = (date.Day, date.Month, date.Year);
+```
+
+```csharp
+ // now instantitate DateTimeOffset
+var date = new DateTimeOffset(2022, 9, 17, 0, 0, 0, 0, TimeSpan.Zero);
+
+// deconstruct DateTimeOffset objcet
+(int day, int month, int year) = date; 
+Console.WriteLine($"I wrote this example on: {month}/{day}/{year}");
+```
+
 ---
 ## Links:
 - [Deconstructing tuples and other types](https://learn.microsoft.com/en-us/dotnet/csharp/fundamentals/functional/deconstruct)