Page Navigation using MVVM in Xamarin.Forms

I am working on xamarin.form cross-platform application , i want to navigate from one page to another on button click. As i cannot do `Navigation.PushAsync(new Page2());` in ViewModel because it only ...

Is a += b operator of char implemented same as a = a + b?

Found an interesting issue that following code runs with a different result: ``` char c = 'a'; c += 'a'; //passed c = c + 'a'; //Cannot implicitly convert type 'int' to 'char'. An explicit convers...

6 Apr at 18:41

.NET Core bluetooth

I'm currently creating an application in .NET core. I want to run this application on a Raspberry Pi Zero W and use the Bluetooth functionality to communicate with an external device (Light Bulb with ...

9 Apr at 15:14

'Connect-MsolService' is not recognized as the name of a cmdlet

``` PSCommand commandToRun = new PSCommand(); commandToRun.AddCommand("Connect-MsolService"); commandToRun.AddParameter("Credential", new PSCredential(msolUsername, msolPassword)); powershell.Streams...

9 Feb at 20:43

Mocking MediatR 3 with Moq

We've recently started using MediatR to allow us to de-clutter controller actions as we re-factor a large customer facing portal and convert it all to C#. As part of this we are increasing our unit te...

5 Feb at 13:3

Redis ids:xyz is a set of all keys in urn:xyz - no grooming

We are experience that for every key we are storing in redis urn:xyz a entry in a set ids:xyz is created automatically. see following printscreen [](https://i.stack.imgur.com/J6p98.png) while our ke...

6 Apr at 09:28

Possible to set column ordering in Entity Framework

Is there any possible configuration to set database column ordering in entity framework code first approach..? All of my entity set should have some common fields for keeping recordinfo ``` public D...

Why using multiple database in same instance a bad idea in Redis?

I am new to redis therefore I don't know more about its complex technicalities. But let me put my scenario here: I am running two websites from same server and I wanted redis to work on both. On searc...

23 May at 12:10

Parameterizing a ServiceStack custom SQL query

I have the following custom SQL Query with OrmLite: ``` var results = db.Select<Tuple<Customer,Purchase>>(@"SELECT c.*, 0 EOT, p1.* FROM customer c JOIN purchase p1 ON (c.id = p1.customer_id)...

6 Apr at 02:57

What is Microsoft.DependencyValidation.Analyser and why does Visual Studio 2017 force install the package?

I just installed Visual Studio 2017 (on a fresh Windows 10 VM) in preparation for an upgrade path form 2015. Our existing project uses .Net 4.5.2. (ASP.NET classic/not Core) VS 2017 seems to insist u...

How to access Team Drive using service account with Google Drive .NET API v3

Does anyone know which configurations should be done to grant Google service account an access to a Team Drive which is already created? The idea is to use a service account in a .NET backend applica...

Complex JOIN with ServiceStack OrmLite

How can I express the query below (from [this question](https://stackoverflow.com/questions/2111384/sql-join-selecting-the-last-records-in-a-one-to-many-relationship)): ``` SELECT c.*, p1.* FROM cust...

23 May at 11:46

'Found the synthetic property @panelState. Please include either "BrowserAnimationsModule" or "NoopAnimationsModule" in your application.'

I upgraded an Angular 4 project using angular-seed and now get the error > Found the synthetic property @panelState. Please include either "BrowserAnimationsModule" or "NoopAnimationsModule" in your ...

.NET Framework 3.5 and TLS 1.2

I currently have a web application that uses the .NET 3.5 framework and I am wondering if it will be compatible with TLS 1.2. No where in our code are we dictating TLS version. This is a legacy applic...

5 Apr at 20:3

Async provider in .NET Core DI

I'm just wondering if it's possible to have `async/await` during DI. Doing the following, the DI fails to resolve my service. ``` services.AddScoped(async provider => { var client = new MyClient...

Why doesn't Console.WriteLine work in Visual Studio Code?

I have scriptcs and coderunner installed on Visual Studio Code. When I run a simple program that includes `Console.WriteLine("Test")` I don't see any output. The program seems to run successfully and ...

What is the role of "Flatten" in Keras?

I am trying to understand the role of the `Flatten` function in Keras. Below is my code, which is a simple two-layer network. It takes in 2-dimensional data of shape (3, 2), and outputs 1-dimensional ...

How to specify a base url or host port for Jetbrains Rider asp.net project

I have a C# Asp.net web project made in Visual Studio. The project runs on a certain port (57243) and I made other programs that were testing the web service etc to use "localhost:57243". Recently I ...

5 Apr at 15:18

C# 7 Pattern Matching

Suppose I have the following exception filter ``` try { ... } catch (Exception e) when (e is AggregateException ae && ae.InnerException is ValueException<int> ve || e is ValueException<int> ve) {...

5 Apr at 15:0

Convert opencv image format to PIL image format?

I want to convert an image loaded ``` TestPicture = cv2.imread("flowers.jpg") ``` I would like to run a [PIL filter](http://pillow.readthedocs.io/en/4.0.x/reference/ImageFilter.html) like on the [exa...

How to deal with net::ERR_SSL_PROTOCOL_ERROR?

I am including a JS library into my website ``` <script type="text/javascript" src="http://www.turnjs.com/lib/turn.min.js "></script> ``` that is designed, maintained and hosted by a webdesign comp...

5 Apr at 13:29

get min and max from a specific column scala spark dataframe

I would like to access to the min and max of a specific column from my dataframe but I don't have the header of the column, just its number, so I should I do using scala ? maybe something like this :...

5 Apr at 13:15

What are the options for returning a custom DTO with a specific status code using ServiceStack?

We're using ServiceStack to build a web API. I have a situation where I want to be able to return a response of 400 (BadRequest) from an API endpoint some additional data indicating the specific caus...

5 Apr at 12:37

Unit test controller model validation on AspNetCore

In an ASPNET Core project I am trying to create some unit tests that would verify my data validation logic works fine. My controller is very simple: ``` [HttpPost] [Route("Track")] public void Track...

How can I center an image in Bootstrap?

I am struggling to center an image using only Bootstrap's CSS-classes. I already tried several things. One was adding Bootstrap CSS-class `mx-auto` to the `img` element, but it does nothing. Help is ...

21 May at 00:45