ASP.NET Identity 2.1 Roles Based Authorization

http://bitoftech.net/2015/03/11/asp-net-identity-2-1-roles-based-authorization-authentication-asp-net-web-api/

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"Pending Changes” and “Source Control Explorer” missing from Team Explorer in Visual Studio 2013

To fix the issue simply run the below command in an elevated command prompt as detailed here.

"C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\devenv.exe" /setup

My understanding is this command forces the recreation (what Microsoft refers to as "merging") of current VS settings into what is apparently a corrupt settings cache. On the surface, this is similar to deleting the directory path C:\Users\username\AppData\Local\Microsoft\VisualStudio\version and allowing visual studio to recreate it at launch.

Recently I found this sometimes occurs when I launch several solutions at once (i.e. I have 1 or more Visual Studio instances loading a solution at the same time). I also have ReSharper, SQL Prompt, VSCommands and TFS Power Tools installed which I'm sure contribute to some degree.

UPDATE:

This fix should work for all versions of Visual Studio, however you will need to execute the command in the directory appropriate to your version. For example with Visual Studio 2015 the path would be:

"C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\devenv.exe" /setup

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.NET serialization performance

http://www.hanselman.com/blog/ProperBenchmarkingToDiagnoseAndSolveANETSerializationBottleneck.aspx

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Reactive programming in WPF

Obtics

http://obtics.codeplex.com

Project Description
The object of this project is to create a library that offers Functional Reactive Programming abilities to common .Net languages.
With FRP your calculations automatically respond to changes in the underlying data. Obtics includes a live Object Linq and Linq to Xml.

Continuous LINQ

http://clinq.codeplex.com

Project Description
Continous LINQ is a .NET Framework 3.5 extension that builds on the LINQ query syntax to create continuous, self-updating result sets. 
In traditional LINQ queries, you write your query and get stale results. With Continuous LINQ, 

you write a query and the results of that query are continuously updated as changes are made to the source collection or items within the source collection. 

CLINQ has tremendous value in GUI development and is especially useful in binding to filtered streams of data such as financial or other network message data.

Rx (Reactive Extensions)

https://rx.codeplex.com

The Reactive Extensions (Rx) is a library for composing asynchronous and event-based programs using observable sequences and LINQ-style query operators. Using Rx, developers represent asynchronous data streams withObservables, query asynchronous data streams using LINQ operators, and parameterize the concurrency in the asynchronous data streams using Schedulers. Simply put, Rx = Observables + LINQ + Schedulers.

Whether you are authoring a traditional desktop or web-based application, you have to deal with asynchronous and event-based programming from time to time. Desktop applications have I/O operations and computationally expensive tasks that might take a long time to complete and potentially block other active threads. Furthermore, handling exceptions, cancellation, and synchronization is difficult and error-prone.

Using Rx, you can represent multiple asynchronous data streams (that come from diverse sources, e.g., stock quote, tweets, computer events, web service requests, etc., and subscribe to the event stream using the IObserver interface. The IObservable interface notifies the subscribed IObserver interface whenever an event occurs.

Because observable sequences are data streams, you can query them using standard LINQ query operators implemented by the Observable extension methods. Thus you can filter, project, aggregate, compose and perform time-based operations on multiple events easily by using these standard LINQ operators. In addition, there are a number of other reactive stream specific operators that allow powerful queries to be written.  Cancellation, exceptions, and synchronization are also handled gracefully by using the extension methods provided by Rx.

Rx complements and interoperates smoothly with both synchronous data streams (IEnumerable) and single-value asynchronous computations (Task).

Bindable LINQ 

http://bindablelinq.codeplex.com

(currently not supported)

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HTML Academy

http://htmlacademy.ru

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SSL Error When installing rubygems, Unable to pull data from 'https://rubygems.org/

Make sure you use latest rvm:

rvm get stable

Then you can do two things:

1. Update certificates:

   rvm osx-ssl-certs update all

2. Update rubygems:

   rvm rubygems latest

OR

gem sources -r https://rubygems.org
gem sources -a http://rubygems.org  

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VirtualBox: access Windows-host shared folders from Ubuntu-guest

This is the scenario that you run Windows as your host operating system and Ubuntu in a VirtualBox, and that you want to access a specific Windows folder from Ubuntu.

First you have to make sure that have install Guest Additions. From the VirtualBox’s menu go to Devices → Install Guest Additions…This will mount a virtual CD on your /media/cdrom. Normally this folder’s window will show up. As root run the programVBoxLinuxAdditions.run. When the program completes reboot your VirtualBox.

With Guest Additions installed you may now go ahead and define the shared folder(s). From the VirtualBox’s menu go to Devices → Shared Folders. A dialog will show up. In this dialog you can specify which folder from your Windows system you want to share with your Ubuntu. Press the button with the + symbol to add a new shared folder in the list. You will have to specify a Folder Name for each folder you add. Make sure you memorize that name because you will need it very soon.

When done with you shared folder(s) specification, you may now go ahead and actually mount these folders from Ubuntu. First you have to create a mounpoint, that is, a directory in your Ubuntu which will reflect the shared folder from Windows:

# sudo mkdir /media/windows-share

Of course you may choose an alternative path for your mountpoint. With your mountpoint created you can now mount the shared folder, like this:

# sudo mount -t vboxsf folder-name /media/windows-share

Where folder-name will be the name you assigned for this folder when you were adding it in the shared folders list.

You could use the /etc/init.d/rc.local script to execute these commands on startup to have the shared folders automatically mounted every time you start your Ubuntu VirtualBox.

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