Entity Framework Core logo

“An assembly specified in the application dependencies manifest was not found” when running Add-Migration in Entity Framework Core?

Another quick one – I’m sure this doesn’t apply to all cases, but I’m still logging it in case someone (like myself) stumbles upon the issue and finds help here. I was building a solution with some Azure Functions fetching and populating data in a database, and was planning on building a UI for browsing the data at some point later on – but I actually got stuck on the second step already :) While adding the database to my project, and running Add-Migration in…Continue reading “An assembly specified in the application dependencies manifest was not found” when running Add-Migration in Entity Framework Core?

Pulumi Azure Next-gen logo/splash

Pulumi task on Azure DevOps fails with error “azureblob.OpenBucket: accountName is required”

This article explains how to fix one of the many issues you might face when configuring Pulumi deployments for your Azure DevOps Pipelines! The particular error you may run into was “azureblob.OpenBucket: accountName is required” – what a descriptive one, when there’s no accountName to be specified anywhere! But first – let’s get through the basics. Namely… “Pulumi?”, you ask – “What’s that?” Well, let me give you a 1-line response to that. One very long line, that is. But what was the error I…Continue reading Pulumi task on Azure DevOps fails with error “azureblob.OpenBucket: accountName is required”

Say "Dependency Injection" one more time I DARE YOU

How to inject EF Core DbContext in an Azure Function

Ah, one more on the related topics of different configurations for your Azure Function apps. In this article, I will describe how you can configure the Entity Framework Core database context to be injected into your Azure Functions App. In my experience, this is a very typical and often-needed model to structure your Azure Functions. Therefore, while tooling and templates aren’t quite there, it’s worthwhile to document how to do this somewhere – well, here. Solution I’ve posted before about how to instantiate a database…Continue reading How to inject EF Core DbContext in an Azure Function

Entity Framework - am I right?

“Conversion overflow” when reading numeric data from MS SQL database using Entity Framework

This article explains how to fix a weird situation where your .NET application utilizing Entity Framework or Entity Framework Core simply crashes without any way to recover or catch the Exception. You only get errors somewhere along the lines of “conversion overflow”. Ah – what a fun little issue! Problem So when you’re trying to instantiate an entity with a property of type decimal, you’ll get one of the 2 following exceptions with varying Call Stacks: Conversion overflow or: Arithmetic overflow error converting numeric to data type numeric…Continue reading “Conversion overflow” when reading numeric data from MS SQL database using Entity Framework

Azure Functions CLI - such a pretty logo for such an awesome functionality

How to configure Azure Function’s startup

Azure Functions use dependency injection, and that allows us to define all kinds of prebuilt or custom-built services as being available for our functions really easily. This is a really easy way to initialize scoped resources to be used in your different functions… But how do you actually configure them in an Azure Functions App? Problem Okay, a step back – there’s a bit of a problem that we need to resolve before we can proceed with the configuration. When you create a new Azure…Continue reading How to configure Azure Function’s startup

git logo

How to list your git stashes

Long story short, yes, I really had to google this, and since top results seemed to give pretty unclear (or even wrong) answers, I decided to document it for myself. Maybe it’ll be helpful to someone else too! And just to state the obvious: I’m using GitHub Desktop for most of my mandatory Git stuff, but whenever I have to run any git commands, I run Windows PowerShell (git exe is added to PATH variable). Solution Well, it’s actually very, VERY simple. You can just…Continue reading How to list your git stashes

SharePoint is not broken - it just does't work

(Literally) Breaking: Changes to app authentication on SharePoint! 😵

This article explains how to get rid of sudden and unexplainable 401 Access Denied errors when trying to authenticate against a fairly fresh Microsoft 365 / SharePoint Online tenant. This issue seems to be caused by a long-ish project to finally retire ACS – Azure Access Control service) on SharePoint (it’s retired everywhere else already!) Note: This is an updating story, as the situation with ACS is definitely… Developing. Yeah, let’s call it that. It’s a developing situation. Problem In the beginning of September (2020),…Continue reading (Literally) Breaking: Changes to app authentication on SharePoint! 😵

Azure Active Directory, the advanced logo

AADSTS50011 – The resource principal named was not found in the tenant | An easy fix!

Another day, another variant of AADSTS50011! With a lot of apps and web services using Azure Active Directory for authentication, you’re bound to run into issues, right? Ah well, one would hope to avoid them. But at least this one is usually easy to fix! Let’s first take a closer look at the different versions of the error you might face, and then see how we can fix or avoid them altogether! Problem I’ve encountered 2 different variants of this particular issue – the error…Continue reading AADSTS50011 – The resource principal named was not found in the tenant | An easy fix!

MSDN-related queries in my Google Search Console data. There's quite a few...

The MSDN Downloads / Subscriber links

This article serves as a simple glossary of important MSDN Subscriber links that I always forget – links that Microsoft keeps updating, that is! I’ll be updating the post as need be :) And yes, I do feel a little bit ridiculous about creating an actual article about something as simple as a list of links to stuff that should be easily discoverable by any search engine. But I suppose it is what it is. Anyway, it seems to me like any time I need…Continue reading The MSDN Downloads / Subscriber links

Visual Studio logo

How to restore lost windows in Visual Studio?

This article explains how to restore any hidden windows in Visual Studio without resetting your whole window layout, by using a common keyboard shortcut. Problem We’ve all been there – you’re opening a new window in Visual Studio, but your keyboard shortcut or clicking the item in the menu simply seems to do nothing. The window doesn’t show up anywhere. Reason The reason for this (most of the time) is simple: you have the window popped-up and located outside your screen. This happens pretty much…Continue reading How to restore lost windows in Visual Studio?

Dependency hell

How to resolve “Microsoft.Data.SqlClient is not supported on this platform.” in an Azure Function App?

Hah – another interesting one. This article describes how to resolve an error along the lines of “Microsoft.Data.SqlClient: Microsoft.Data.SqlClient is not supported on this platform.“, thrown by Azure Functions host. Apparently you can run into this issue either on your local development machine or even in Azure. Problem For me, this error popped up after some house cleaning tasks – dependency updates, merging feature branches… You know the stuff. And suddenly, while the Azure Function App would build and run just fine, my SQL calls…Continue reading How to resolve “Microsoft.Data.SqlClient is not supported on this platform.” in an Azure Function App?

T-SQL, yes please!

How to verify connection to database in Entity Framework Core?

This article explains how to perform a very simple and lightweight database connection test for an existing database context. A while ago, I needed to develop a simple API that I can poll from a load balancer to see whether: An Azure service hosting it is up and It has a connection to its SQL database This simple API would be used for monitoring purposes – simple stuff, sure, but what’s the best way to implement this without causing any unnecessary load to the database,…Continue reading How to verify connection to database in Entity Framework Core?

Entity Framework Core logo

How to resolve persistent “Build started… Build failed.” when trying to run Entity Framework Core commands?

This time, I’m happy to present you perhaps the simplest way of fixing an annoying and persistent issue with a misleading error message! Wait, does that sound familiar? It’s almost like that’s what half of my articles are about… Anyway, I was happily going my way about creating a couple of new fields to an entity and then scaffolding my changes to a new migration using Entity Framework Core’s Add-Migration, but this happened: Build started… Build failed. “Oh”, I thought. “I must have messed something…Continue reading How to resolve persistent “Build started… Build failed.” when trying to run Entity Framework Core commands?

WHAT IN TARNATION EF CORE?

How to resolve another “An error occurred while updating the entries” exception in Entity Framework Core

This article offers yet another possible fix to an issue, where trying to call SaveChanges() in Entity Framework Core throws a pretty generic “An error occurred while updating the entries”-exception, and you’re left wondering what in tarnation is wrong this time. And admittedly, that’s a really generic error, so it could be pretty much whatever. But in this article, I’ll go through one possibility – hopefully it helps! Problem So I was just pushing in some new rows to an incredibly simple table in my…Continue reading How to resolve another “An error occurred while updating the entries” exception in Entity Framework Core

One does not simply use just one DbContext with multiple ConnectionStrings in Entity Framework Core.

How to implement multiple Connection Strings for one DbContext in EF Core?

Recently, while building an app service to host a .NET Core API, I had to implement the logic for using both Read-Only and Read-Write Database Contexts for Entity Framework Core. In this particular case, it was the same database – just different contexts, because depending on the location of the app service the app was deployed in, read and write operations might actually go to different database instances, That’s really easy, right? Well… Yes and no. Essentially, it’s easy to spin up, but comes with…Continue reading How to implement multiple Connection Strings for one DbContext in EF Core?

AppInsights logo

How to fix weird “Production Breakpoints” errors in an Azure App Service?

This article describes a curious fix I found to an issue where Application Insights (seemingly) crashes your Azure App Service, leaving behind interesting, yet non-descriptive errors in the Application Event Logs. The actual symptoms might be your Azure app service just timing out with no errors being surfaced on the front-end. Frustrating. Problem Does your Azure App Service’s event log look like this? Full of “Production Breakpoints” with weird errors about named pipes? In my case, the errors were something like these below: And: Or:…Continue reading How to fix weird “Production Breakpoints” errors in an Azure App Service?

C# & .NET

How to get the EF Core Connection String?

This article describes how to access and extract the connection strings from your Entity Framework (Core) database context objects. This is quite convenient if you need to display or log the connection string used for your current DbContext for some reason – or if you somehow form your DbContext objects dynamically, and need to verify which connection string you’re using. I’m sure there are other use cases, too. You probably have an interesting one, if you landed on this page! Problem A while ago, I…Continue reading How to get the EF Core Connection String?

Azure DevOps - Always Be Shipping!

Fun with Azure DevOps NuGet package versioning!

This article will briefly explain the different NuGet package versioning schemes – both automatic and manual – available. Then we’ll take a look at how to implement a nifty, and quite frankly, downright elegant automatic versioning scheme for your NuGet packages. Okay – returning from quite a trip down another rabbit hole, I think it’s a good time to document some of my findings in regards to Azure DevOps NuGet package versioning! This seems to be another area, where the documentation certainly does exist, but…Continue reading Fun with Azure DevOps NuGet package versioning!

Debugging. Yeah, that's roughly what the process looks like. With all those tiny symbols and all. Debug/Trace/Whatever.

Adding Debug listeners to your console application fails in .NET Core

Every now and then comes the need to write your console output to a log file. There’s a simple way to do this in .NET Framework, and quite a few online articles detailing a borderline one-liner on how to do achieve it: Adding a log file listener(s) by calling Debug.Listeners – something like this: TextWriterTraceListener tr1 = new TextWriterTraceListener(System.Console.Out); Debug.Listeners.Add(tr1); TextWriterTraceListener tr2 = new TextWriterTraceListener(System.IO.File.CreateText(“Output.txt”)); Debug.Listeners.Add(tr2); Source However, this doesn’t work in .NET Core anymore. Problem: Everything changes in .NET Core Using the code offered…Continue reading Adding Debug listeners to your console application fails in .NET Core

Microsoft SQL Server logo

How to connect to your local MSSQL server using SSMS?

Every now and then you run into a situation, where you really need to run some SQL against your local development database. That database, at least in my case, is hosted on your local SQL Server Express. Connecting to a local SQL Server should be a walk in a park, right? Eh, well… While using a connection string to connect to said DB is easy, you can’t do that with the SQL Server Management Studio. I wish you could, but hey – it is what…Continue reading How to connect to your local MSSQL server using SSMS?