LoggerFactory Generates InvalidOperationException

I've created a console application using Microsoft.Extensions.Logging that uses a service layer. ``` public static void Main(string[] args) { // Create service collection var serviceCollectio...

11 Jan at 17:18

.NET Core IssuerSigningKey from file for JWT Bearer Authentication

I am struggling with the implementation (or the understanding) of signing keys for JWT Bearer Token authentication. And I hope somebody can help me or explain me what I am missunderstanding. The last...

26 Feb at 07:47

When is it more efficient to pass structs by value and when by ref in C#?

I've researched a bit and it seems that the common wisdom says that structs should be under 16 bytes because otherwise they incur a performance penalty for copying. With C#7 and ref return it became q...

7 Mar at 18:4

Set cookies for cross origin requests

How to share cookies cross origin? More specifically, how to use the `Set-Cookie` header in combination with the header `Access-Control-Allow-Origin`? Here's an explanation of my situation: I am att...

How to pass some data through signalR header or query string in .net core 2.0 app

Using signalR in .net 4.7 we were able to pass two variables from the client application to signalR server. Here is the code snippet: ``` public class MyHub : Hub { protected (string myVar1, stri...

ServiceStack Json deserialization error

Here is the code of my .net core 2.0 console app: ``` using ServiceStack; using System; using System.Collections.Generic; namespace ConsoleApp1 { class Program { static void Main(...

18 Sep at 11:10

XMLHttpRequest blocked by CORS Policy

I add an API with following script in let's say [http://www.test.com](http://www.test.com): ``` <script src="http://apiendpoint.com/api/v1/api.js"></script> <div id="api" data-apikey="LA59CJI9HZ-KIJ...

16 Jun at 18:55

How To design configurable field level permissions with Entity Framework

Say we have a table of information pertaining certain models of cars, such as the following: [](https://i.stack.imgur.com/Oz7g2.png) How would I best implement field level access permissions for read...

No authenticationScheme was specified, and there was no DefaultChallengeScheme found Cookies Authentication

I am using the below code for authentication in ASP.NET Core 2.0 using cookies ``` services .AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme) .AddCookie("MyCookieMiddlewar...

10 Jun at 05:46

Cannot open new Jupyter Notebook [Permission Denied]

I have installed Jupyter Notebook on ubuntu 16.04 using pip3. I can execute `jupyter notebook` command. It opens and shows a list of current path directories. But I cannot create a new notebook(). It...

27 Aug at 09:0

ServiceStack and Fody Costura

I'm pretty new to ServiceStack, so apologies in advance if the nomenclature is not 100%. I create a test self-hosted application and the ServiceStack Service was in the same assembly as the mainlin...

18 Sep at 04:0

How can I use IConfiguration from my integration tests?

I have an API, and I'm trying to make some integration tests for it with XUnit. Here's my API controller constructor: ``` public class MyController : Controller { readonly IMyRepository _myReposi...

Is there something similar to C# regions in JavaScript? Visual Studio 2017

I am doing work for somebody who would like their JavaScript library organized into categories: CRUD functions, Form functions, etc. They really like the utility of regions in C# and are asking for th...

Unable to merge dex

I have Android Studio Beta. I created a new project with compile my old modules but when I tried launching the app it did not launch with the message: ``` Error:Execution failed for task ':app:transf...

13 Nov at 22:36

Could not reliably determine the server's fully qualified domain name ... How to solve it in Docker?

I am just starting in Docker and I was following that [tutorial](https://www.youtube.com/watch?v=YFl2mCHdv24) that shows basically these steps: 1. Create a Dockerfile like this: From php:7.0-apache c...

9 Mar at 17:59

Visual Studio Code: How to configure includePath for better IntelliSense results

I am a complete beginner to using Visual Studio Code and I have no clue what I am doing. I've searched around (maybe not enough), but I can't find just a simple explanation for someone like me on how...

12 May at 23:40

MSBUILD throws error: The SDK 'Microsoft.NET.Sdk' specified could not be found

I'm trying to build a solution using msbuild command line and I keep getting this error: `error MSB4236: The SDK 'Microsoft.NET.Sdk' specified could not be found.` The version of msbuild is the late...

16 Sep at 19:5

Fall through in pattern matching

currently in c#7 (version 15.3.4) following code is valid to compile but both variables are legitimately unusable. ``` switch(fruit) { case Apple apple: case Orange orange: // impossible ...

How to upload a large file through an Azure function?

I am exploring Azure Functions. The scenarios I have tested so far work great. I am at a point where I am trying to figure out a way to upload files (20MB+) through an Azure Function. The idea is t...

Jest - how to test if a component does not exist?

How do I check if a component is not present, i.e. that a specific component has not been rendered?

17 Sep at 10:13

Change arrow colors in Bootstraps carousel

I'm obviously missing something stupidly simple here. I have images with a white background so I want to be able to edit the arrows on the Bootstraps Carousel so they are visible. So many changing the...

Entity Framework Core 2 (Code First) updating value not working

I've been struggling with changing values in a database for a week and can't find out what I'm doing wrong. I managed to create tables, to add and delete entities but I can't change a value inside an ...

What is this invisible, performance eating cell in a recycling ListView?

So I've had performance issues in my Xamarin.Forms app (on Android) using a `ListView`. The reason is, because I'm using a very complex custom control in the ListView's `ItemTemplate`. To improve per...

opencv.imshow will cause jupyter notebook crash

I check other question on google or stackoverflow, they are talking about run cv2.imshow in script, but my code run in jupyter notebook. Here is my configuration: 1. ubuntu 16.4x64 2. python 3.5 3....

18 Jul at 15:31

How to add an item to an ArrayList in Kotlin?

How to add an item to an `ArrayList` in Kotlin?

17 Jun at 11:33