Xamarin and .NET Standard 2 Library issue

I've created a cross platform library which has 3 platform specific implementations: - - - I've packed the library with Nuget in a similar vein as the cross platform library project does it. [](ht...

Failed to load the hostfxr.dll after install net core

Anyone has this problem i change Pc and tried to install net core framework but vs code return this info when i tried to write dontet --info ``` Failed to load the dll from [C:\Program Files\dotnet...

1 Jun at 13:38

KeyNotFoundException in Startup ConfigureServices AddMvc()

Since 30.05.2018 my ASP.NET Core code in Startup.cs ``` public IServiceProvider ConfigureServices(IServiceCollection services) { // Add services to the collection. services.AddMvc(); } ``` th...

1 Jun at 14:5

Calling extension method's overload with derived type

Simplified, i have these 2 `Extension` method: ``` public static class Extensions { public static string GetString(this Exception e) { return "Standard!!!"; } public static st...

1 Jun at 10:50

AspNet.Core, IdentityServer 4: Unauthorized (401) during websocket handshake with SignalR 1.0 using JWT bearer token

I have two aspnet.core services. One for IdentityServer 4, and one for the API used by Angular4+ clients. The SignalR hub runs on the API. The whole solution runs on docker but that should not matter ...

MSBuild is replacing Newtonsoft.Json.dll with an older version

I am using the MSBuild runner in TeamCity to build an ASP.net web api and running unit tests. Everything was working, until I upgraded to "Microsoft Build Tools 2017 15.7.2". Suddenly msbuild was co...

How to run unsafe code in "visual studio code"?

I am using Visual studio code and when I try to run an unsafe code it throws the following error ""message": Unsafe code may only appear if compiling with /unsafe" and as in visual studio, it does n...

1 Jun at 07:5

Local functions and SOLID principles C#

I know that starting from C# 7.0 we are able to create local functions, but how is this related with the SOLID principles to achieve a good design model? I mean, doesn't this break the Single Responsi...

6 May at 18:45

How to open a Chrome Profile through --user-data-dir argument of Selenium

I am attempting to load a chrome browser with selenium using my existing account and settings from my profile. I can get this working using ChromeOptions to set the userdatadir and profile director...

C# - Convert list of enum values to list of strings

Let's say I have a C# `enum` called `MyEnum`: And I have a `List` such as: What is the **easiest** way to convert my `List` to a `List`? Do I have to create a new `List` and then iterate through the e...

16 May at 18:36

Concatenate ReadOnlySpan<char>

Ok, .NET Core 2.1 has landed. With it we've gotten a new way to work with string data being `ReadOnlySpan<char>`. It's great at splitting string data, but what about combining the spans back together?...

1 Jun at 01:25

Wiring up Simple Injector in WebForms in .NET 4.7.2

With the changes in .NET 4.7.2, constructor injection is now possible in Web Forms. I have gotten Simple Injector working with Web Forms, but would like some input as to if there any "gotchas" I might...

Routing is not working with self-hosted web API

This is essentially what I have, a very simple set of three files with fresh asp.net core 2.1 (actually copy-pasted from tutorials): ``` public class Program { public static void Main(string[] ar...

ServiceStack Grouping of Requests Together

Now I may have my thinking of this all wrong seeing as though I'm relatively new to ServiceStack, however, if I was to have three API requests all part of the same request, for example: 1. /Broadcas...

31 May at 17:32

Json.NET deserializing DateTimeOffset value fails for DateTimeOffset.MinValue without timezone

In my ASP.NET Core Web-API project, I'm getting a HTTP POST call to one of my API controllers. While evaluating the JSON payload and deserializing its contents, Json.NET stumbles upon a DateTime valu...

The project system has encountered an error When trying to load project

In Visual Studio 2017 v15.7.1 I am getting the following error window when trying to load one of my projects: [](https://i.stack.imgur.com/jl3rY.png) And when I go to the path specified, inside the ...

31 May at 12:50

How to call cygwin compiled C++ from .NET Core?

I am trying to do something similar to [this](https://stackoverflow.com/questions/30121129/intermittent-access-violation-when-using-c-sharp-to-access-c-dll): I am working on Windows but my intention ...

1 Jun at 08:12

Migrating to .NET Core 2.1 breaks Swagger UI

Recently we have migrated our project from `.NET Core 2.0` to `.NET Core 2.1`. As a result our Swagger documentation site stopped working. We are still able to access it. We can see the customized tit...

31 May at 12:9

.Net Core 2.1 - Cannot access a disposed object.Object name: 'IServiceProvider'

I just migrated .NET Core 2.0 to .NET Core 2.1. Everything went fine, but when I try to login now I get the folowing error: > - This happens in this bit of code: ``` public class AppContractResolv...

31 May at 14:27

Unable to load DLL 'libdl' when using System.Drawing.Common NuGet package on AWS Lambda

We have a thumbnail generator lambda function which I'm trying to update to .NET Core 2.0, but I've encountered the following error when using Microsoft's `System.Drawing.Common` NuGet package: > Typ...

27 Jun at 00:28

.NET Core Identity as UI canceling Register

I want to cancel the 'Register' option in a .NET Core 2.1 + Identity as UI application. I can of course simply remove the button from the page, question is - is that safe ? If not what are my other ...

How to find curve corner points using JTS or NTS?

I have a curve (say JTS edge): [](https://i.stack.imgur.com/aatuZ.png) How to find all curve direction change points that surpasses given angle using [JTS (Java)](https://locationtech.github.io/jts/...

15 Jun at 17:11

Unable to add reference to installed NuGet package?

I created a NuGet package and I was able to successfully install it in another .NET solution. But I'm not able to add a reference to the NuGet package from the other .NET solution. For example, the Nu...

16 May at 18:36

ASP.NET Web API Authentication.GetExternalLoginInfoAsync always return null

I have ASP.NET 5 project and I am using Web API to establish the external login (for Facebook and Google). In my case, I have Web API controller (Not MVC controller) which contains the following code ...

ASP.Net Core Replacement for VirtualPathUtility

Is there a replacement for `VirtualPathUtility.ToAbsolute` in ASP.Net Core? It doesn't seem to be available. I'm wanting to convert a relative path e.g. "~/bob" into an absolute path, e.g. "/app/bob"...

30 May at 11:48