Why the tuple-type list element's value cannot be modified?

In C# 8.0, I can modify the value inside a tuple directly by accessing the field name: ``` (string name, int score) student = ("Tom", 100); student.name = "Jack"; Console.WriteLine(student); ``` And ...

28 Mar at 09:56

How can I change the background color of Elevated Button in Flutter from function?

I am new to Flutter, and I started Flutter last week. And now I want to make a simple Xylophone application. I created the UI successfully and made a function `playSound(int soundNumber)`, but when I ...

Difference in lambda expressions between full .NET framework and .NET Core

Is there a difference in the declaration of lambda expressions between the .NET Framework and .NET Core? The following expressions compiles in .NET Core: ``` var lastShift = timeline.Appointments ...

27 Mar at 21:57

What does the "default" generic constraint do?

The following code compiles, but it seems that Microsoft's docs don't mention this particular constraint type at all. ``` class TestGenericsBase<T1> { public virtual void Method1<T>(T arg) { ...

22 Mar at 20:44

ServiceStack JsonServiceClient: SendAsync uses wrong path, ignores Route attribute?

I am using JsonServiceClient in a Xamarin app, like this: ``` JsonServiceClient client = new JsonServiceClient("https://my.domain.com/"); SetHeaders(client); var request = ...; // this is IRequest<T>...

17 Jun at 00:6

App studio connection issue with SS 5.10.4

I Am trying to add a running project to app studio but I get error that I need at least SS v 5.8.1 [](https://i.stack.imgur.com/5yIZ0.png) I am using version 5.10.4 from myget. I have updated `app` t...

21 Mar at 18:6

How to fix C# Warning CA1416 in vscode?

I'm just starting to learn following on [Youtube](https://www.youtube.com/channel/UCYbK_tjZ2OrIZFBvU6CCMiA). Upon writing along I get this problem pop up in vscode: ``` { "resource": "/d:/OneDrive/P...

21 Mar at 16:37

Azure Kubernetes .NET Core App to Azure SQL Database Intermittent Error 258

We are running a .NET Core 3.1 application in a Kubernetes cluster. The application connects to an Azure SQL Database using EF Core 3.1.7, with Microsoft.Data.SqlClient 1.1.3. At seemingly random time...

How to install homebrew on M1 mac

I just got a new Mac, the M1 Macbook pro and I am trying to install homebrew, but every time I finish installing it, it tells me that it was not written to the path, and then when I try the advised wh...

17 Mar at 02:24

M1 docker preview and keycloak 'image's platform (linux/amd64) does not match the detected host platform (linux/arm64/v8)' Issue

I just downloaded Docker Preview v3.1 [https://docs.docker.com/docker-for-mac/apple-m1/](https://docs.docker.com/docker-for-mac/apple-m1/) and tried running keycloak. Anyone else running into this iss...

16 Mar at 21:23

ServiceStack with Angular (9) compilation error after upgrade from 1.0.46 to 1.0.47

In our package.json we used `^` to declare the package reference `@servicestack/client`. Since the last update of the ServiceStack repo to the new version `1.0.47` we get the following error: ``` ERRO...

15 Mar at 11:1

How to check the code is running in AOT in C#?

I am using compiled expressions to create instance. It is very fast in JIT but not in AOT (even slower) because of the fallback process. So I want to check whether the code is running in AOT. If yes, ...

15 Mar at 10:32

Durable Functions: How to pass a parameter to the Orchestrator?

I am new to Azure Durable functions and have been following the sample code in the book ['Azure Serverless Computing Cookbook'](https://github.com/PacktPublishing/Azure-Serverless-Computing-Cookbook-T...

14 Mar at 00:40

Why do Entity Framework Core migrations require .NET Core 2.x?

In my .NET5.0 project the PostgreSQL Nuget package is installed (`Npgsql.EntityFrameworkCore.PostgrSQL (5.0.2)`) and its dependency of EF Core (`Microsoft.EntityFrameworkCore (5.0.2)`). I'm trying to ...

13 Mar at 19:24

Is MediatR library overused in CQRS examples on the web?

I'm struggling to understand why so many examples on the web are using MediatR when explaining CQRS patterns, when dealing with commands and queries. Almost everywhere I see examples where Commands an...

ServiceStack export C# DTO-Class to dtos.ts file

How can I export a C# class (DTO) in the dtos.ts file generated with `npm run typescript-ref http://localhost:5000 src/myproject` without referencing in the request class? we have several C# DTO clas...

10 Mar at 15:8

Could not write lines to file "obj\Debug\net5.0\SolutionName.GeneratedMSBuildEditorConfig.editorconfig exceeds the OS max path limit

I was doing a project, I runned 1 time and it was fine, I runned the second time and this error appeard So I did a little research and the most common response was to re-install visual studio, so i d...

9 Mar at 17:4

What does the [ApiController] attribute do?

I've noticed it is the same thing if this attribute is used or not. Am I wrong? As an example: ``` [Route("[controller]")] [ApiController] public class DataTablesController: ControllerBase { [Http...

C# with ServiceStack and Angular - Use enumeration classes instead of enum types in dto.ts

How can I get access to the properties (ex. `AddressChanges`) of my custom enum-class in the `dto.ts` file generated by ServiceStack for Angular? ``` public class MutationType : Enumeration { pub...

5 Mar at 08:43

Sql in ormlite servicestack

I use ormlite with servicestack and I have got this problem. I have saved a list of string in a column of my db so I want to do a select sql like this: Select top 1 * From MyTable Where MyVariable In ...

ServiceStack.Redis RedisTypedClient TTL

I'm using ServiceStack.Redis v5.10.4 and trying to set the TTL using the following code: mClientsManager = IRedisClientsManager ttl = TimeSpan? ``` await using var client = await mClientsManager.GetC...

3 Mar at 17:39

OrmLite upsert from table

Currently `Save()` API offers upsert behaviour when passing in a collection but is there anyway to make it work when inserting from another table? The way I upsert with raw PostgreSQL is like this: ``...

2 Mar at 09:54

Selecting OrmLite new object from joined table for insertion

I have 3 entities: ``` [CompositeIndex(nameof(Url), nameof(TargetDomainRecordId), nameof(UserAuthCustomId), Unique = true)] public class WatchedUrlRecord { [AutoIncrement] publ...

1 Mar at 16:14

ServiceStack - System.Web.HttpContext.Current.Session is null

I have legacy .net mvc application integrated with ServiceStack APIs, I need to get/set Session values from ServiceStack APIs in order to communicate with legacy system to ensure proper working. I exp...

'Could not load type 'Microsoft.Extensions.Primitives.InplaceStringBuilder' from assembly 'Microsoft.Extensions.Primitives

I am working on an ASP.NET Core v2.1 Razor Pages project in which I am working on implementing Auth0 for user authentication. After setting everything up, I attempted to build my project and am gettin...

1 Mar at 04:10