Singleton httpclient vs creating new httpclient request

I am trying to create layer for webservice using HttpClient in my `Xamarin.Forms` mobile app. 1. without singlton pattern 2. with singleton pattern in approach i am creating new http client obje...

Why do my ServiceStack APIs seem to use an in memory Bearertoken for refresh until it expires

I have JWT Token based stateless Auth architecture. My client includes a valid RefreshToken token in all HTTP Requests to my ServiceStack APIs. The RefreshToken has a 7 day expiration, something lik...

14 Feb at 02:49

ServiceStack: AuthUser vs IAuthSession - how do I retrieve the AuthUser?

In previous Stack Overflow questions, @mythz tells about the Meta dictionary in the "UserAuth table". However, I cannot find any information on where the UserAuth "table" is or where the object can be...

2 Dec at 21:24

How to download file created in Colaboratory workspace?

I found many hints how to upload data into [Colaboratory]( But now I want to do opposite -> I want to download .csv I've created in Colaboratory workspace. How to ...

13 Feb at 19:30

Servicestack serverless example - authenticated services fail

We are trying to send another coder an example web page which contains javascript that authenticates to our ServiceStack service and then runs a sample service. That code fails when run in Chrome and ...

14 Feb at 13:9

Using Moq, System.InvalidCastException : Unable to cast object of type 'Castle.Proxies.ObjectProxy' to type

Can someone help me to fix this error message please? I don't understand why the cast doesn't work: > Message: System.InvalidCastException : Unable to cast object of type 'Castle.Proxies.ObjectProx...

13 Feb at 18:49

Localization of RequiredAttribute in ASP.NET Core 2.0

I'm struggling with localization in my new .NET Core project. I have 2 projects: - - I do not want to have separate language files for Models/Views etc. Microsofts documentation is not very clea...

13 Feb at 15:32

Entity Framework Core: A second operation started on this context before a previous operation completed

I'm working on a ASP.Net Core 2.0 project using Entity Framework Core ``` <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.1" /> <PackageReference Include="Microsoft.EntityFr...

8 Oct at 12:40

Move window when external application's window moves

I've got an always on-top application (basically a status display) that I want to follow around another program and always sit just to the left of the minimize button. I can get the `Rect` representi...

22 Dec at 01:54

System.Security.Permissions missing when invoking JsonConvert.DeserializeObject<T> in .NET Core 2.0

I am currently looking at using .NET Core 2.0 so that I can run my app on multiple platforms. One thing I need to do is take an incoming string and deseralise it into an object. e.g. ``` var result...

13 Feb at 12:49

Operator '||' cannot be applied to operands of type 'bool?' and 'bool?'

I want to check if one of two strings contains a partial string. Knowing that firstString or secondString can be null, I tried the following: ``` string firstString= getValue(); string secondString...

15 Feb at 12:32

#if DEBUG vs if (env.IsDevelopment())

It seems that [Preprocessor Directives]( (`#if DEBUG`) and [ASP.NET Core Environment Name](ht...

12 Feb at 20:57

ServiceStack: Several logins from different devices (phone, web etc) - I want one session per device

The problem: it seems to me, like the normal and best way to look at sessions is: . So, you can have one session alive per device, meaning one session per web browser, per phone, tablet etc. You shoul...

16 Aug at 23:32

Why does RedisManager property removed from ServiceStack/Service.cs file?

Previously we had a RedisManager property in the version of 4.0.50 but in the latest version this property is removed. Can anyone know why it is been removed? What is the replacement for it?

Swagger TypeError: Failed to execute 'fetch' on 'Window': Request with GET/HEAD method cannot have body

I have added Swagger to my Spring Boot 2 application: This is my Swagger config: ``` @Configuration @EnableSwagger2 public class SwaggerConfig { @Bean public Docket api() { // @form...

Generic method with type constraints or base class parameter

If I write a method accepting a parameter which derives from a `BaseClass` (or an interface), as far as I know there are two ways to achieve that: ``` void MyMethod<T>(T obj) where T : BaseClass { ......

23 Jul at 16:17

Why does a `null` Nullable<T> have a hash code?

Bit of a weird question... But can anyone give me a justification for why this would be expected behaviour? This just seems totally odd to me.... ``` //Makes perfect sense object o = null; o.GetHas...

12 Feb at 22:10

ToArrayAsync() throws "The source IQueryable doesn't implement IAsyncEnumerable"

I have a MVC project on ASP.NET Core, my problem is connected with IQueryable and asynchronous. I wrote the following method for search in `IQueryable<T>`: ``` private IQueryable<InternalOrderInfo> W...

Create a ClassLibrary in .NET is compatible with all the frameworks

I want to create a compatible ClassLibraray, But I don't know how to create it. e.g: ![Project Property]( ![References](

12 Feb at 09:5

ASP.NET Core 2.0 Web App Deployment and Hosting

My local dev environment is a Windows 10 PC using Visual Studio 2017. NOTE: At the moment I can only access my web server via cpanel. However, if the hosting provider cannot provide adequate suppor...

12 Feb at 06:53

Passing .net core model data to external javascript?

I have a .NET Core Razor view with the underlying model inside a *.cshtml.cs file. Let's say I have a string like this: How can I access this variable (data) inside my external JavaScript file? I need...

5 May at 15:50

how to add a Run Button and Compile Button on the toolbar in visual studio

I want to add a "" button and a "" button on the toolbar so that I may not have to Press or

11 Feb at 16:31

Appropriate design pattern for the payment modules c#

As i am learning through design pattern concept and also wanted to implement the payment modules in my project using the proper design pattern. So for that I have created some sample code. Currently...

15 Nov at 14:49

How to read images into a script without using using imageio or scikit image?

I am trying to read a `png` image in python. The `imread` function in `scipy` is being [deprecated](

25 Oct at 06:49

Vue 'export default' vs 'new Vue'

I just installed Vue and have been following some tutorials to create a project using the vue-cli webpack template. When it creates the component, I notice it binds our data inside of the following: ...

11 Feb at 02:59