TL;DR Problem: Client making 90,000 CSOM calls/month, 88% were redundant EnsureUser operations for users already on the site. Solution: Use FieldUserValue.FromUser() optimistically with ExceptionHandlingScope for server-side try-catch logic. Impact: 75-85% reduction in API calls (90,000 → …

Have you ever watched a user frantically editing a SharePoint list item? Click save, make another tiny change, click save again, then realize they made a typo and… click save once more. Meanwhile, your perfectly crafted webhook is firing off like a machine gun, triggering expensive operations …

The Problem: When Parallel Programming Backfires If you’ve ever optimized your C# API calls with parallel programming, you might know this story. Your client wants faster performance. You run multiple API requests in parallel. Locally, everything flies — especially late at night when traffic is low. …