I have an application that normally should be a simple console application to be programmed as a scheduled task from time to time called by the windows task scheduler. The program should launch som...

I have a .Net 5 Web Api project and want to use Mapster v7.2.0 to avoid mapping objects manually. The following code shows a sample scenario setup a mapping configuration map from multiple sourc...

I attempt to lunch my ASP.NET Core project in Microsoft Visual Studio 2019 and got this error: "Unable to connect to web server 'IIS Express'" Visual Studio 2019 Version 16.9.5 .Net 5.0 ...

Before .NET5 we serialize/deserialize the Bytes/Object by these code: private static byte[] StructToBytes<T>(T t) { using (var ms = new MemoryStream()) { var bf = new BinaryFormatter();...

I've tried different ways to prevent this from happening. After changing to render-mode="Server" I was able to prevent rendering twice on the first load. But now when I refresh the page i...

I made a C# 9 source code generator, you can find it here When I use the whole project inside another solution and reference it as a project it works but when I upload it with current configs into ...

According to the docs for .NET Core 5, there's a method SetBasePath and it's widely used in a bunch of blogs (example 1, example 2, example 3 etc.). There's no notion of it being a weird gotcha or ...

I have Microsoft .NET SDK 5.0.102 (x64) installed on my Windows 10, but when I do dotnet --list-sdks nothing shows up? I could see the SDK installed from Windows Apps & features. Thank you. Edi...

Please I updated my .NET 5 to .NET 6 and I have this errors on adding migration: System.MissingMethodException: Method not found: 'System.Type Microsoft.EntityFrameworkCore.Metadata.ITypeBase.get_C...

In the past I used the classes Installer, ServiceInstaller and ServiceProcessInstaller to make my app self-installable. I just had to run InstallUtil.exe MyApp to install the app as a Windows Servi...

I have an API and a separate Azure Functions app. I upgraded my API app to .NET 5 and it's working fine. In the API app's solution, I have class library projects that I also reference in my Azure F...

I am exploring Function App running on .net5 in the new isolated mode. I have HTTP triggered functions that I want to advertise via OpenAPI / Swagger. To do so, I am using the package Microsoft.Azu...

I have a netstandard2.0 library that is used by net5.0 applications One of packages used by the library references Microsoft.Bcl.AsyncInterfaces 5.0.0 But I get this warning for every application: ...

One of the biggest hurdles when migrating from .NET Framework to .NET 5+ is having to convert all csproj's to the new SDK-style format. There is no tool to automate this, it has to be done manually...

I get the following Exception when I try to resolve the IOptionsSnapshot service: 'Cannot resolve scoped service 'Microsoft.Extensions.Options.IOptionsSnapshot`1[Test.MyOptions]' from root provide...

II have an "Edit" page in my .Net 5./ASP.Net MVC app. If ModelState.IsValid is "false", I want to check the individual errors before rejecting the entire page. PROBLEM: How do I...

I have a project that was running with .net core 3.1. After upgrading to .net 5 and entity framework core to 5.0.3, the include is not working anymore. I have these classes public class Question { ...

I am writing a custom System.Text.Json.JsonConverter<T> to upgrade an old data model to a new version. I have overridden Read() and implemented the necessary postprocessing. However, I don't ...

This is my first gRPC application. I'm attempting to invoke a server-streaming RPC call from a .NET 5 gRPC client (Grpc.Net.Client 2.35.0) which results in the following exception in my local devel...

When I use Fluent assertions to test if a property is not null, the analysers still complain about subsequent lines which dereference that line as possibly null. Is there any way to get the compile...

Hello everyone I got an error and I`m trying to solve it I found some similar source but could not solve my problem. Similar problem like here. I compile my project .csproj file using .bat file act...

I'm trying to make a asynconus azure function in .net 5 but when it start up i get the following error: [2020-11-16T10:41:06.023Z] A host error has occurred during startup operation '7cd2e743-b753...

I have used the try-convert tool to convert my projects from .NET Framework to .NET 5.0 When inspecting the converted *.csproj files for projects that are targeting .net50-windows I noticed the ele...

I'm trying to use https://github.com/ligershark/WebOptimizer as suggested by microsoft in order to bundle and minimise my js files, so following the instructions, I have the following in my startup...

EDIT: Thank you everyone! I have never upgraded to a newer version of .NET and language version before. Thus didn't know about .csproj configuration. Even though I did a research before posting a ...