Uploaded August 2026 | Updated September 2026, 2 weeks ago
I replaced PowerPoint's animation system with a custom deterministic runtime — my own interpolation engine, timeline cache, trajectory math, and a JavaScript SDK that lets web developers control PowerPoint shapes without touching COM or C#. Today I'm coding live with Codex and watching the results directly in PowerPoint. No slides. No demos. Real architecture, real bugs, real fixes.
PowerPoint is supposed to make presentations. I turned it into a cinematic animation studio with a custom runtime engine underneath. Watch me build it live — writing C# and JavaScript, watching shapes move in ways PowerPoint has no idea how to explain, and slowly turning a productivity app into something that looks more like After Effects.
4 years ago, I started replacing PowerPoint's animation engine with my own. Today I'm live — using Codex to update the runtime, watching the results appear on screen in real time. The architecture has a deterministic playback engine, a JavaScript SDK, a WebView2 overlay system, and a two-surface extension model. Come watch either the code or the animations. Both are interesting.
Built with C#, WPF, VSTO, WebView2, and a JavaScript SDK. All running inside a PowerPoint add-in.
#LiveCoding #DevStream #BuildingInPublic #CodeWithMe #TechYouTube
I replaced PowerPoint's animation system with a custom deterministic runtime — my own interpolation engine, timeline cache, trajectory math, and a JavaScript SDK that lets web developers control PowerPoint shapes without touching COM or C#. Today I'm coding live with Codex and watching the results directly in PowerPoint. No slides. No demos. Real architecture, real bugs, real fixes.
PowerPoint is supposed to make presentations. I turned it into a cinematic animation studio with a custom runtime engine underneath. Watch me build it live — writing C# and JavaScript, watching shapes move in ways PowerPoint has no idea how to explain, and slowly turning a productivity app into something that looks more like After Effects.
4 years ago, I started replacing PowerPoint's animation engine with my own. Today I'm live — using Codex to update the runtime, watching the results appear on screen in real time. The architecture has a deterministic playback engine, a JavaScript SDK, a WebView2 overlay system, and a two-surface extension model. Come watch either the code or the animations. Both are interesting.
Built with C#, WPF, VSTO, WebView2, and a JavaScript SDK. All running inside a PowerPoint add-in.
#LiveCoding #DevStream #BuildingInPublic #CodeWithMe #TechYouTube
![Fix Visual Studio IntelliSense Shows Errors but Compiles and Builds Successfully [SOLVED]](https://i.ytimg.com/vi/q_BlNPXNaf8/mqdefault.jpg "Fix Visual Studio IntelliSense Shows Errors but Compiles and Builds Successfully [SOLVED]
Struggling with Visual Studio showing hundreds of IntelliSense errors even though your project compiles, builds, and runs perfectly? Youre in the right place! This tutorial provides a quick, safe, and effective solution to fix these frustrating phantom errors.
In this video, I demonstrate a real-world scenario in my PowerPoint VSTO add-in project where the Error List showed 291 errors in the Build + IntelliSense view but showed zero errors and built successfully in Build Only mode. This is a common issue that can happen in any complex C# or .NET project when the Visual Studio cache becomes corrupted or outdated.
The root cause is often a stale cache stored in hidden folders within your solution. I will walk you through the simple, step-by-step process of safely locating and deleting the .vs, bin, and obj folders to force Visual Studio to regenerate them, resolving these phantom errors for good.
🕒 TIMESTAMPS / CHAPTERS:
0:00 - Introduction: Explaining the IntelliSense Error Problem
1:04 - Proving the Build is Successful (Switching to Build Only mode)
1:58 - Explaining the Cause: Corrupted Visual Studio Cache
3:19 - Locating the Hidden .vs Folder in Windows Explorer
4:35 - The Solution: Deleting the .vs, bin, and obj Folders
6:25 - Re-opening Visual Studio and Starting the Clean/Rebuild
8:22 - Verification: The IntelliSense Errors Are Gone!
8:45 - Final Summary & How to Get More Tutorials
💡 WHAT YOU WILL LEARN:
- How to differentiate between genuine build errors and IntelliSense cache errors.
- The purpose of the .vs, bin, and obj folders in a Visual Studio solution.
- The safe and correct procedure to clear your projects cache without losing any important data.
- How to force Visual Studio to perform a clean rebuild to fix corrupted file references.
- This solution is applicable to a wide range of C# and .NET projects, including:
- VSTO Add-ins (PowerPoint, Excel, Word, Outlook)
- WPF and WinForms Desktop Applications
- ASP.NET and .NET Core Web Applications
- Class Libraries and more.
If this video helped you solve your problem, please give it a thumbs up 👍 and let me know in the comments below! Your feedback is incredibly valuable.
🔔 Dont forget to subscribe to the channel for more programming tutorials, tips, and troubleshooting guides.
Thanks for watching!
#visualstudio #csharp #troubleshooting #programming")
