C# Application runs in Windows 10 but not Windows Vista

Question

How do I make my program compatible in all windows OS?

Afzaal Ahmad Zeeshan · Answer

Their APIs are different. Windows Vista was a very old version of Windows even before Windows 7. Where as Windows 10 applications are Native applications build using C++. C# applications with .NET framework. Universal windows applications that run natively using Windows Runtime. That is why you need to design your applications in such a way that they support many frameworks. If that is not possible then write a cross-platform program. There are many languages available for cross-platform programming: Java C# C++ If you want to learn more about C# programming for cross-platform support read this article of mine: http://www.c-sharpcorner.com/UploadFile/201fc1/using-C-Sharp-for-cross-platform-development/ Later just work on the designing and architecture of the application to make it work on other platforms too.