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Questions tagged [.net-6.0]

For questions about Microsoft's .NET application development framework that are specific to version 6.0+ of the framework. Use only If your question are version-specific

3 votes
2 answers
2k views

Policy Authorization in Azure Functions .net 6

I'm attempting to migrate from a REST API that I developed in a Web App to Azure Functions. In the Web App I use the "Authorize" attribute decoration with a Policy like: [Authorize(Policy = ...
0 votes
1 answer
30 views

Unable to send a local image that isn't under wwwroot to openai using its new .NET library

I have an ASP.NET Core 6 Web API with the new official library from OpenAI (https://github.com/openai/openai-dotnet). What I'm trying to do, is to use a local image file to OpenAI. The file isn't ...
280 votes
16 answers
253k views

Non-nullable property must contain a non-null value when exiting constructor. Consider declaring the property as nullable

I have a simple class like this. public class Greeting { public string From { get; set; } public string To { get; set; } public string Message { get; set; } } Strangely I get the ...
0 votes
0 answers
26 views

Any pitfalls in upgrading a WPF application from .Net 6 to .Net 8?

We're looking to upgrade some large WPF solutions from .Net 6 to 8, and my understanding is that the process should be straightforward (changing the projects' target framework). But are there any ...
0 votes
0 answers
42 views

Populate a many to one relationship and how to show data input only once but increment if the date in the input are the same

I am currently working on a web project that required user to input a group of value for each person in a department per day then display it in two other index for day and month. I'm having problems ...
0 votes
0 answers
271 views

Replacement for Microsoft.Practices.EnterpriseLibrary.Validation in .Net 6

I'm converting an old application from .Net 4x to .Net 6, and I can't seem to find a replacement for Microsoft.Practices.EnterpriseLibrary.Validation. In newer code we've used System.ComponentModel....
-1 votes
1 answer
46 views

C# WPF Change Text Event From TextBox

i have a problem. I made a new class called "LetterBox" this class inherits from TextBox everything is working for now. But here comes the problem: I need the Event or Function that "...
46 votes
6 answers
33k views

How to fix Visual Studio 2022 Warning CA1416 "Call site reachable by all platforms" but "only supported on: 'windows'"?

So I have a C# class library project that I only intend to use on Windows. It contains some classes that use the System.Drawing.Image class which is only available on Windows. After upgrading to ...
0 votes
3 answers
84 views

How to let HostedService run after host started?

I have a .NET 6 console app. Program.cs code: using Microsoft.Extensions.DependencyInjection; using Microsoft.Extensions.Hosting; using Microsoft.Extensions.Logging; using System.Threading; using ...
0 votes
1 answer
29 views

Can't load System.Net.WebHeaderCollection

.net 6.0 project, it throw the exception can't find a dll version 6. this is the error: System.AggregateException: One or more errors occurred. (Could not load file or assembly 'System.Net....
0 votes
0 answers
20 views

AsyncWebserver_Teensy returns invalid status line

Problem My teensy is connected to 4 Serial devices and I use the Webserver provide access to them over a local network. I have a Raspberry Pi that is requesting data from the Webserver in multiple ...
0 votes
2 answers
1k views

How to properly save a complex object using EF Core

I have a problem with saving a complex object... The (simplified) objects look like this: public class Excavator { public int Id { get; set; } public ExcavatorType Type { get; set;...
5 votes
2 answers
5k views

.NET 6 to SQL Server error, Pre-login handshake failed - [Pre-Login] initialization=21001;

This is not a duplicate of A connection was successfully established with the server, but then an error occurred during the pre-login handshake . I have two applications, one built on .NET Framework 4....
38 votes
2 answers
6k views

FileVersionInfo.ProductVersion suddenly contains git commit hash

I have a .NET 6 WPF project and cannot figure out what changed as the ProductVersion of my assembly suddenly contains a git commit hash. My project file always looked like this, where I also updated ...
8 votes
1 answer
3k views

How to host blazor webassembly app with different base path

I have a Blazor Webassembly, .NET hosted application. On the server we host it on, the base path of the app will be mydomain.com/coolapp. Therefore, to try to get the app to render correctly on the ...

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