Update README.md

Author: Nick06888

README.md

@@ -1 +1,8 @@
-# decrease-input-number
+# decrease-input-number
+## How to import the source code
+### 1. Open Program.cs in the folder source-code-EXPLAINED
+### 2. Use the shortcuts Ctrl + A (Select All) and Ctrl + C (Copy)
+### 3. Open Visual Studio (Any Version) click New Project and search for App Console (.NET Framework)
+### 4. Type the name you want and select .NET Framework v4.8, click create
+### 5. In the main file (Program.cs) use the shortcut Ctrl + V (Paste) and where there's namespace Indietro replace Indietro with the name of your project
+### 6. Now all should work, click Run and enjoy!