Added another catch block (#21965)

* Added another catch block

Added two more catch blocks, so the user can see, he can handle different exception types differently

* fixed comment to match catch statement

guide/english/csharp/try-catch/index.md

@@ -68,7 +68,7 @@ var parsedUserInput = Int32.Parse(userInput);  // Correct
 ```
 
 ## Catch block
-This block is where you specify what type of ```Exception``` you want to catch. If you want to catch ALL possible exceptions you can use the ```Exception``` base class. If you want to only catch a specific type of exception you can specify that instead. Some examples of other exception types are ```ArgumentException```, ```OutOfMemoryException ``` and ```FormatException```.
+This block is where you specify what type of ```Exception``` you want to catch. If you want to catch ALL possible exceptions you can use the ```Exception``` base class. If you want to only catch a specific type of exception you can specify that instead. Some examples of other exception types are ```ArgumentException```, ```OutOfMemoryException ``` and ```FormatException```. You can also use the exception types to handle these exceptions different.
 
 ```csharp
 try
@@ -78,8 +78,21 @@ try
 // Only FormatExceptions will be caught in this catch block.
 catch(FormatException exceptionVariable)
 {
+    // DO SOMETHING
     Console.WriteLine(exceptionVariable.Message);
 }
+// Only ArgumentNullException will be caught in this catch block.
+catch(ArgumentNullException nullException)
+{
+    // DO SOMETHING DIFFERENT
+    Console.WriteLine(nullException.Message);
+}
+// Catch every other possible exception
+catch(Exception exception)
+{
+    // DO SOMETHING ELSE
+    Console.WriteLine(exception.Message);
+}
 ```
 The variable declared after the type of exception will contain all the data of the exception and can be used within the ```Catch``` block.