Taking Advantage of Garbage Collection

csharp_fundamentals/5_working_with_reference_types_and_value_types.md

@@ -95,3 +95,7 @@ Differentiate btw Value & Reference:
 How to check whether it's reference or value type:
 * Place cursor in VSCode to type, Press `F12`, we can see metadata for the type. It will show whether it's `struct` or `class`
 * The only exception is `String`, it's a reference type but often behave like a value type (i.e. passed as value in function by default)
+
+## Taking Advantage of Garbage Collection
+
+.NET runtime provide Garbage Collection service: keep track of objects created, recycle memeory by itself when nothing reference the obj.