momento pattern example

Author: anupavanm

README.md

@@ -1698,71 +1698,84 @@ First of all we have our memento object that will be able to hold the editor sta
 ```C#
 class EditorMemento
 {
-  protected $content;
+ private string mContent;
 
-  public function __construct(string $content)
-  {
-  $this->content = $content;
-  }
+ public EditorMemento(string content)
+ {
+ mContent = content;
+ }
 
- public function getContent()
+ public string Content
+ {
+ get
  {
-  return $this->content;
+ return mContent;
  }
+ }
 }
 ```
 
 Then we have our editor i.e. originator that is going to use memento object
 
 ```C#
-class Editor
-{
- protected $content = '';
+class Editor {
 
- public function type(string $words)
- {
- $this->content = $this->content . ' ' . $words;
- }
+ private string mContent = string.Empty;
+ private EditorMemento memento;
 
-  public function getContent()
-  {
-  return $this->content;
-  }
+ public Editor()
+ {
+ memento = new EditorMemento(string.Empty);
+ }
 
-  public function save()
-  {
-  return new EditorMemento($this->content);
-  }
+ public void Type(string words)
+ {
+ mContent = String.Concat(mContent," ", words);
+ }
 
- public function restore(EditorMemento $memento)
+ public string Content
+ {
+ get
  {
-  $this->content = $memento->getContent();
+ return mContent;
  }
+ }
+
+ public void Save()
+ {
+ memento = new EditorMemento(mContent);
+ }
+
+ public void Restore()
+ {
+ mContent = memento.Content;
+ }
 }
 ```
 
 And then it can be used as
 
 ```C#
-$editor = new Editor();
+var editor = new Editor();
 
-// Type some stuff
-$editor->type('This is the first sentence.');
-$editor->type('This is second.');
+//Type some stuff
+editor.Type("This is the first sentence.");
+editor.Type("This is second.");
 
 // Save the state to restore to : This is the first sentence. This is second.
-$saved = $editor->save();
+editor.Save();
+
+//Type some more
+editor.Type("This is thrid.");
 
-// Type some more
-$editor->type('And this is third.');
+//Output the content
+Console.WriteLine(editor.Content); // This is the first sentence. This is second. This is third.
 
-// Output: Content before Saving
-echo $editor->getContent(); // This is the first sentence. This is second. And this is third.
+//Restoring to last saved state
+editor.Restore();
 
-// Restoring to last saved state
-$editor->restore($saved);
+Console.Write(editor.Content); // This is the first sentence. This is second
 
-$editor->getContent(); // This is the first sentence. This is second.
 ```
 
 😎 Observer