"Predefined type System.ValueTuple is not defined or imported" after upgrading to .NET 4.7

I'm upgrading an existing solution from .NET 4.6.2 to .NET 4.7. This solution depends on several nuget packages that target .NET 4.6.2 and hence depend on the nuget [System.ValueTuple](https://www.nug...

9 Aug at 14:12

Why Local Functions generate IL different from Anonymous Methods and Lambda Expressions?

Why the C# 7 Compiler turns Local Functions into methods within the same class where their parent function is. While for Anonymous Methods (and Lambda Expressions) the compiler generates a nested clas...

26 Jul at 21:45

Db.LoadSelect throws NullReferenceException

Starting to pull my hair out over this, so thought I might try asking here. I have this simple service: ``` public class EventService : Service { public object Get(GetEvents request) { ...

26 Jul at 21:23

ServiceStackHost.Instance has already been set (BasicAppHost)

I am using xunit to run test. One by one it works just fine but once I run them in parallel servicestack throws exception. ``` System.IO.InvalidDataException : ServiceStackHost.Instance has already b...

26 Jul at 16:0

vs_buildtools.exe missing from Visual Studio Build Tools 2017

I [installed](https://www.visualstudio.com/downloads/) the Visual Studio Build Tools 2017 using the link (at bottom under Other Tools and Frameworks) installing both workloads: Visual C++ build tools ...

How to set base path property in swagger for .Net Core Web API

i've built a Web API in ASP.Net Core (version 1.1.2) and i use the Swashbuckle.AspNetCore for generating the swagger definition. below is a part of the automatically generated swagger definition. i w...

Odd return syntax statement

I know this may sound strange but I don't know even how to search this syntax in internet and also I am not sure what exactly means. So I've watched over some MoreLINQ code and then I noticed this me...

14 Dec at 12:22

How to detect lines in OpenCV?

I am trying to detect lines in parking as shown below. [](https://i.stack.imgur.com/sDQLM.png) What I hope to get is the clear lines and (x,y) position in the crossed line. However, the result is not ...

20 Jun at 09:12

How to use paginator from material angular?

I'm new to angular and trying to implement pagination in my app. I am trying to use [this material component.](https://material.angular.io/components/paginator/overview) With the code below, I can get...

23 Dec at 12:8

Could not find a valid GoogleService-Info.plist in your project

When I run my swift 3.2 code with Xcode 9 beta 4 this is the error I get: `*** Terminating app due to uncaught exception 'com.firebase.core', reason: '[FIRApp configure]; (FirebaseApp.configure() in ...

Get claims from a WebAPI Controller - JWT Token,

I have built an application which uses JWT bearer authentication in ASP.NET Core. When authenticating I define some custom claims which i need to read in another WebAPI controller in order to execute...

25 Jul at 23:55

Serilog structured data pretty print?

Is there a way to make Serilog format structured data into a formatted output? I've been using structured data structures in Serilog lately and even though there is an advantage of it being compact ...

How to call docker run from c# application

I've got a WPF application that whilst processing a file needs to use a docker process. The docker container is built on the box, currently after processing a file with the WPF application the user ha...

25 Jul at 16:33

Build with Roslyn, but leave the "compile-at-runtime" executables at the door?

There has been a lot of talk about the C# compiler [Roslyn](https://www.safaribooksonline.com/library/view/c-60-in/9781491927090/ch27.html#whatapostrophes_new_in_chash_6dot0) on and the internet in g...

Need to know how to search in ES using c# searching in arrays

Hello I am a newbie on `ElasticSearch` and need help. I'm working with c# (thought I could use a `QueryRaw` in String I think...). Below the scenario: ``` { "id": "1", "title": "Small cars"...

25 Jul at 14:54

Why is Entity Framework generating the following nested SQL for Azure Mobile Services Table Controllers

I'm trying to get to the bottom of an entity Framework issue when using it with a `TableController` I've created the following setup. 1. The basic TodoItem example provided with a new Mobile Web AP...

ServiceStack 4 C# client async call hangs

I am using ServiceStack 4 client to access a RESTful api endpoint. I have written two methods to return a list of objects. The synchronize method returns data as expected. The async methods hangs on t...

25 Jul at 06:20

"Could not find a version that satisfies the requirement opencv-python"

I am struggling with Jetson TX2 board (aarch64). I need to install python wrapper for OpenCV. I can do: ``` $ sudo apt-get install python-opencv ``` But I cannot do: ``` $ sudo pip install openc...

25 Jul at 04:27

Referencing between NetStandard and .Net Framework

I'm trying to get .Net Framework and NetStandard assemblies to communicate with each other (to learn what is possible). I currently have four projects, two Framework 4.5.2 projects and two NetStandard...

IController vs ControllerBase vs Controller vs MyController?

I have an ASP.NET MVC project I have been building and was looking through some documentation when I came across how the Controller class is implemented. I am pretty familiar with OOP but have a few q...

24 Jul at 23:10

Routes with different controllers but same action name fails to produce wanted urls

I am trying to set up a API for my MVC web app that will have a lot of routes but much of the same part for each one. Basically a CRUD for each area. I am also setting it up to be version-able. I h...

How can I create a new instance of DateTime in specific time zone?

Given a specific TimeZoneInfo instance how can I create a new DateTime instance in the specified time zone? For example if I have: I am always getting **12/31/2016 7:00:00 PM** regardless of what `Dat...

4 Jun at 03:42

Custom RazorPage get access to IRequest and Route Info

Using the Razor implementation for ServiceStack and AspNetCore how can I get access to the IRequest to get the route info for a custom razor page? Ultimately I want to get to the Name attribute on th...

24 Jul at 19:38

Adding a HTTP header to the Angular HttpClient doesn't send the header, why?

Here is my code: ``` import { HttpClient, HttpErrorResponse, HttpHeaders } from '@angular/common/http'; ``` --- ``` logIn(username: string, password: string) { const url = 'http://server.c...

How to format JSON in notepad++

I want to format JSON String in notepad++. Kindly guide me how to do so. I looked into this solution [Notepad ++ JSON Format](https://stackoverflow.com/questions/1560464/how-to-reformat-json-in-notepa...

24 Jul at 17:37