Latest · Aug 25, 2026
Stop Retrying the Unretryable: Permanent Failures in Durable Functions
Learn how to build a Durable Functions retry policy based on exception type, so permanent errors short-circuit instead of burning every retry attempt.
The Archive
Every post on the blog: war stories from real .NET, Azure, Microsoft Graph and SharePoint projects, with the code, the failures and what the docs left out.
AllowIncrementalResults: CAML Past the 5,000 Item Wall
Learn how to query SharePoint lists beyond the 5,000 item list view threshold in CSOM with AllowIncrementalResults, paging and indexed columns.
#sharepoint
List View Threshold: What Still Works at 10,000 Items
Learn which SharePoint queries survive the 5,000 item list view threshold, with CAML joins, CSOM, REST, Graph and $batch measured on a 10,000 item list.
#sharepoint
One Message, One Site: Deterministic Instance IDs in Durable Functions
Learn how deterministic orchestration instance IDs stop Service Bus redelivery from starting the same Durable Functions provisioning twice.
#azure-functions
CAML Joins Across Lists: One Query Instead of Four
Learn how a CAML join across SharePoint lists linked by lookup columns compares with separate queries, OData expands and Graph, measured on the same data.
#sharepoint
Graph Multi-Value Lookups: The LookupId Shape That Works
Learn how to write multi-value lookup and person columns on SharePoint list items with Microsoft Graph, using the LookupId array syntax the docs never show you.
#sharepoint
Every Activity Will Run Twice: Idempotency in Durable Functions
Learn how to make every Durable Functions activity idempotent so retry policies can safely rerun SharePoint and Graph provisioning steps.
#sharepoint
CSOM vs SharePoint REST vs Graph: My Pick-One Playbook
Learn when to use CSOM, SharePoint REST or Microsoft Graph for SharePoint work, and which operations each one silently refuses to do.
#sharepoint
PnP Core vs PnP.Framework: Why I Haven't Switched Yet
Learn why I'm still on PnP.Framework instead of PnP Core, the two blockers holding the migration back, and what has to land before I make the jump.
#sharepoint
F12 Shows Your API Key: Proxy It Behind an Azure Function
Learn how to keep third-party API keys out of the browser by proxying SPFx web part calls through an Azure Function that swaps in the secret server-side.
#sharepoint
Provision Forward, Never Backward: Checkpointing Durable Functions
Learn how to checkpoint a Durable Functions orchestration so a failed SharePoint provisioning run resumes where it stopped instead of starting over.
#sharepoint
Durable Functions: A Function That Sleeps for a Week
Learn what Azure Durable Functions are and what they can do, using a SharePoint site provisioning workflow as a real-world example.
#azure-functions
Stop Re-Downloading Unchanged Blobs: Let Azure Answer 304 for You
Learn how to forward the browser's If-None-Match header to Azure Blob Storage with BlobRequestConditions, so unchanged files never leave storage at all.
#csharp
Serve a Static Site From Blob Storage With an Azure Function
Learn how a single Azure Function with a catch-all route can proxy an entire static website out of a private Blob Storage container, with auth in front of every file.
#csharp
Your Add-in Gets a Free Folder in Everyone's OneDrive (Use It)
Learn how to store Outlook add-in user preferences in the OneDrive App Folder via the Graph approot endpoint, so settings roam across every device.
#microsoft-graph
Outlook Mobile Has No getAsFileAsync: Fall Back to Graph
Learn how to fall back to the Microsoft Graph MIME endpoint when getAsFileAsync isn't available in Outlook on mobile, so your add-in keeps working everywhere.
#microsoft-graph
There's No Popup on a Phone: Nested App Auth for Outlook Add-ins
Learn how to get MSAL tokens inside Outlook on mobile with Nested App Auth (NAA), from the brk-multihub redirect URI to acquireTokenSilent with a loginHint.
#authentication
The SharePoint CSOM Performance Playbook: Stop Paying for Wasted API Calls
Learn how to speed up SharePoint CSOM with five proven techniques - batching, CAML joins, change detection, server-side exception handling, and fast taxonomy loading.
#sharepoint
Why My Outlook Add-in Lies About Its Version (And Yours Should Too)
Learn why declaring a low Mailbox requirement set in your Outlook add-in manifest is the key to mobile support, and how to feature-detect newer APIs at runtime.
#outlook-add-ins
One Big PnP Template or Many Small Ones?
After testing with DevProxy, I found that monolithic PnP templates silently destroy your retry strategy. Here's what I learned.
#sharepoint
SharePoint News Links via Graph SDK: Filling in the Gaps the Docs Left Behind
Learn how to create SharePoint News Link pages with a banner image using the Microsoft Graph Beta SDK in C# — including the multipart upload the official documentation leaves completely undocumented.
#sharepoint
Create Microsoft 365 Groups Without the Welcome Email Flood
Learn how to create Microsoft 365 groups programmatically with the Graph SDK in C# without sending a welcome email flood to every member.
#sharepoint
Load SharePoint Taxonomy Fields Fast With FieldValuesForEdit
An undocumented but effective approach to dramatically speed up CSOM taxonomy field loading when dealing with SharePoint list items that have many terms.
#sharepoint
SharePoint CSOM: Prevent Unnecessary Updates and API Calls
The SharePoint API call that wasted resources is now optimized with smart change detection, reducing unnecessary updates and costs.
#sharepoint
SharePoint's Server-Side Try-Catch: ExceptionHandlingScope
Discover how SharePoint's ExceptionHandlingScope can optimize your API calls, reduce costs, and enhance performance with server-side exception handling.
#sharepoint
Optimize SharePoint Webhooks: Debouncing User Actions
Learn how to effectively debounce SharePoint webhooks to optimize performance and reduce unnecessary operations when users frequently click save.
#sharepoint
Stop Retrying Everything: Smart Graph Batch Retry Logic
Learn smart retry logic for Microsoft Graph batching to optimize API calls, reduce throttling, and enhance user experience.
#sharepoint
Graph Batching for File Content: Mapping Requests to Responses
How to handle Graph batching when downloading file content and mapping responses back to original requests
#sharepoint
Batch Your CSOM Operations Instead of Looping One by One
Learn how to dramatically improve CSOM performance by batching operations instead of executing them one by one
#sharepoint
DevProxy: How to Test API Rate Limiting and Throttling in C# Development
Discover how to simulate Microsoft Graph and SharePoint throttling locally using DevProxy, and prevent production slowdowns before they happen.
#sharepoint
Efficient Multi-List Queries in CSOM: Using CAML Joins with CAMLEX
Learn how to efficiently query multiple SharePoint lists using CAML joins instead of multiple API calls to avoid throttling
#sharepoint
Microsoft Graph SDK Authentication in C#: Quick Start Guide
Learn how to authenticate to Microsoft Graph in C# with ClientCertificateCredential, with working snippets for both the v4 SDK and the v5/v6 SDK.
#sharepoint
PnP.Framework Authentication in C#: A Beginner's Guide
Learn to authenticate C# applications with PnP.Framework and Azure using certificates in this beginner's guide to app registration and permissions.
#sharepoint
Export files as zip from SharePoint
Learn how to download multiple SharePoint files as a zip from C# code, using Graph batching to fetch them and streaming each to disk instead of into memory.
#sharepoint
Update list to use content type
We've all tried creating a SharePoint list without using Content Types from the start. It seems like the quick solution, but it can lead to challenges later when restructuring the list. This post explains why using Content Types from the beginning is a smart move that can save time and hassle in the long run.
#sharepoint
SPFx Audience targeting
Learn how to build an SPFx wrapper component that shows or hides content based on Microsoft 365 group membership, using getMemberGroups and a session cache.
#sharepoint
Web Api logging attribute
Learn how to move Web API logging out of every controller method and into one C# attribute built on IActionFilter, logging the controller and its parameters.
#csharp
SQL save changes w. trigger
Easiest way to keep track of which changes have been made to an object, and likewise, who has carried out these changes.
#csharp
EF for SharePoint
#sharepoint
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