Why does a dynamic parameter in a generic method throw a null reference exception when using an Object?

I wonder if someone could explain why in this code ``` public class SomeClass { public T GenericMethod<T>(dynamic value) { return (T)value; } } ``` the 'return value;' statement...

24 May at 07:6

c# how Delete AM/PM from Date

I want to get Date Time of today without having "AM/PM" DateTime dt=DateTime.Now; gives me > 23/05/2016 03:16:51 AM I want the result be : > 23/05/2016 15:16:51

5 May at 15:3

Getter without body, Setter with

I have a property which is currently automatic. ``` public string MyProperty { get; set; } ``` However, I now need it to perform some action every time it changes, so I want to add logic to the set...

23 May at 13:25

Missing events using IServerEvents.NotifyChannel

I'm trying to send messages using Server Sent Events to JS clients. The client gets only every 6th or 7th event. What am I doing wrong? The behavior can be reproduced using a simple standalone sample...

23 May at 12:7

JPA Hibernate Persistence exception [PersistenceUnit: default] Unable to build Hibernate SessionFactory

I've been trying to sort out a connection to my DB with JPA Hibernate and mysql, but for some reason, no matter what i try, when launching the tomcat server i get the same exception: ``` org.springfr...

23 May at 10:37

Page loaded over HTTPS but requested an insecure XMLHttpRequest endpoint

I have a page with some D3 javascript on. This page sits within a HTTPS website, but the certificate is self-signed. When I load the page, my D3 visualisations do not show, and I get the error: > Mi...

ReactJS: Warning: setState(...): Cannot update during an existing state transition

I am trying to refactor the following code from my render view: ``` <Button href="#" active={!this.state.singleJourney} onClick={this.handleButtonChange.bind(this,false)} >Retour</Button> ``` to a ...

23 May at 09:29

Read environment variables in ASP.NET Core

Running my ASP.NET Core application using [DNX](https://stackoverflow.com/questions/30374725/is-net-execution-environment-dnx-similar-to-mono), I was able to set environment variables from the command...

Jenkins "Console Output" log location in filesystem

I want to access and grep Jenkins Console Output as a post build step in the same job that creates this output. Redirecting logs with `>> log.txt` is not a solution since this is not supported by my b...

23 May at 08:51

What does flex: 1 mean?

As we all know, the `flex` property is a shorthand for the `flex-grow`, `flex-shrink`, and the `flex-basis` properties. Its default value is `0 1 auto`, which means ``` flex-grow: 0; flex-shrink: 1; ...

31 May at 02:50

Difference between DbTransaction and DbContextTransaction?

When `EntityFramework` query was wrapped in `DbContextTransaction` created with `dbContext.Database.BeginTransaction()` method I've got the following error: > at NMemory.Transactions.Transaction.Ensu...

23 May at 08:20

Filter and delete filtered elements in an array

I want to remove specific elements in the original array (which is `var a`). I `filter()` that array and `splice()` returned new array. but that doesn't affect the original array in this code. How can...

4 Apr at 19:15

TensorFlow, "'module' object has no attribute 'placeholder'"

I've been trying to use tensorflow for two days now installing and reinstalling it over and over again in python2.7 and 3.4. No matter what I do, I get this error message when trying to use tensorflo...

23 May at 06:24

Can't compile SocialBootstrapApi

I downloaded the SocialBootstrapApi from GitHub but I can't run the example. When I try to run it I get: ``` Severity Code Description Project File Line Suppression State Error CS0234 The type or nam...

22 May at 23:15

HttpClient keeps receiving bad request

I'm having a hard time resolving my Bad Request responses from a REST api when I'm creating a client using C#. I tested the REST api using Fiddler 2 and executing it there, but when I'm creating the ...

22 May at 22:30

ServiceStack, authentication and passing session header with request

I need to validate a user against an application with custom UserName and Password. The credentials are compared with those in database and then the user can be authorized. I configured my adding t...

22 May at 21:18

Servicestack dynamic datatable

One of the requirement I have is to show some reports(basically queries) as a datatable with sorting & filtering. Since I have a few queries I was thinking of writing a generic utility which I can us...

22 May at 18:2

Extend Express Request object using Typescript

I’m trying to add a property to express request object from a middleware using typescript. However I can’t figure out how to add extra properties to the object. I’d prefer to not use bracket notation ...

29 Dec at 13:58

Enable AOT in Xamarin for Android (Visual Studio)

I know that there's support for AOT in Xamarin for Android. After the software became free, all of its features became free as well. I read around the documentation and I enabled AOT by modifying my ...

22 May at 17:13

Laravel 5.2 redirect back with success message

I'm trying to get a success message back to my home page on laravel. ``` return redirect()->back()->withSuccess('IT WORKS!'); ``` For some reason the variable $success doesn't get any value after r...

22 May at 15:57

UWP - A debugger is attached to .exe but not configured

I'm developing Windows Store App (UWP) and I have a problem with native code - I have this message.[](https://i.stack.imgur.com/xFI9L.png) This exception throw after this code fired for second or thi...

How can I send a Firebase Cloud Messaging notification without use the Firebase Console?

I'm starting with the new Google service for the notifications, `Firebase Cloud Messaging`. Thanks to this code [https://github.com/firebase/quickstart-android/tree/master/messaging](https://github....

Can I optionally turn off the JsonIgnore attribute at runtime?

I am creating a JSON file with Newtonsoft.Json from a set of classes. The file created is very large, so I have created `JsonProperty`'s for the properties to reduce the size and added `JsonIgnore` an...

22 May at 15:42

The "GenerateJavaStubs" task failed

Currently banging my head against a wall with this issue, the error is preventing me from building and running my application. It is a PCL project. ``` Error The "GenerateJavaStubs" task failed unexp...

22 May at 06:46

InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Http.IHttpContextAccessor'

I started to convert my asp.net core RC1 project to RC2 and faced with problem that now `IHttpContextAccessor`does not resolved. For sake of simplicity I created new ASP.NET RC2 project using Visual ...