Windows PowerShell on Linux Ubuntu 14.04
Microsoft finally open sourced and ported Windows PowerShell to Linux. As we use Windows PowerShell quite often in our daily business we decided to check out and test PowerShell on […]
Use Strong Name Key on TeamCity for Digital Signature
We started using strong names for some of our assemblies. Strong named assemblies are assemblies, that get digitally signed with a strong name key to ensure its uniqueness (i.e. in […]
[HOWTO] Parsing DateTime with TimeZone information in Newtonsoft.Json
If you have been working with C# and JSON you mmight probably resorted to Newtonsoft.Json, the defacto standard in .NET for handling JSON related data. However, when it comes to […]
[HOWTO] Analyze PowerShell Scripts with PSScriptAnalyzer
A few weeks ago we started publishing our PowerShell modules to PowerShell Gallery. After publishing the module biz.dfch.PS.Appclusive.Client the first time we got an email from PowerShell gallery with some code analysis results with severity Error. As written in the email the analysis was performed with a module called PSScriptAnalyzer. We considered the project description and documentation at GitHub and […]
[HOWTO] Sign PDF with SuisseID
Today I had some troubles signing a PDF document with my SuisseID (Smart card version). I first tried to sign the PDF document by using Adobe Acrobat Reader DC. Unfortunately […]
[HOWTO] Publish PowerShell Module to PowerShellGallery with TeamCity 9.x
Hi I’m Steven Pilatschek, apprentice of the d-fens GmbH. I started my apprenticeship in August 2015. The first year of my apprenticeship I participated a program in a training center. […]
[NoBrainer] Avoiding Concurrency Exceptions when working with a DataServiceContext in PowerShell
When working with a DataServiceContext from PowerShell you might run into concurrency update situations after updating entities via SaveChanges. This is due to the behaviour of the DataServiceContext ChangeTracker which will not reflect changes performed by the server (as a result of our update operation). Let me illustrate this with a quick example: Suppose we have a Catalogue entity where […]
[NoBrainer] PowerShell and Broken TabCompletion
The other day I was working in a PowerShell session when I suddenly realised that Powershell’s TabCompletion feature was no longer working. That was strange, as it certainly normally and […]
Improving Pester and Exception Assertion
Today’s post will cover the Pester testing framework. If you ever have used Pester for more the sunshine scenarios you will have noticed that the assertion of exceptions is a little bit, hmm, awkward. Pester provides an integrated Throw operator that will parse the exception message. This has some limitations such as when running in non-english environments the message may […]
[NoBrainer] PUT/PATCH/MERGE with OData Service Client
Visual Studio supports the generation of data service clients (Service references) for OData services. A data service client is a .NET class that contains methods for accessing the OData service and gets generated based on the metadata provided by the OData service. The client acts as a proxy and translates the method calls into HTTP requests. Mike Wasson describes in […]
[NoBrainer] Mocking DateTimeOffset and DateTime with Telerik JustMock return unexpected values
Today’s post goes rather quick … Telerik JustMock in its commercial (i.e. non-free) version provides you the option to mock static classes, which comes in really handy when you want […]
The Case of the mystery log4net logging Behaviour when using PowerShell and C# with multiple Configurations
This blog post is about log4net which switches log configurations within a process as soon as two components are using their own log4net configuration. As you can read from our numerous blogs we are using PowerShell in combination with C# quite extensively. In addition we are heavily relying on log4net for logging puposes (see our PowerShell module biz.dfch.PS.System.Logging (available at […]
[NoBrainer] Code Contracts in Interfaces with abstract base classes will not trigger if override is not specified
Today I ran into a problem when all of a sudden my code contracts stopped working – as it seemed. In reality I was missing a simple override in the implementation of a class that derived from a base class. But now for a a concrete example. Suppose you have the following scenario: ContractClassForIArbitraryObject this class holds the contract for […]
Code Contracts in Interfaces are evaluated after Contracts in Class Implementations
I recently noticed an — at least for me — unexpected behaviour when working with Code Contracts in interfaces. When you define a contract for an interface (via ContractClassFor) and implement a class from that interface that contract is certainly enforced. However when you define additional requirements on that implementation class these contracts are evaluated BEFORE the interface contracts. Here […]
C# Code Contracts and Interface Properties
I recently ran into a problem when trying to use Code Contracts on Auto-Implemented Properties (i.e. Automatic Properties) combined with a C# interface. I started with a normal interface IScriptInvokerImpl where I wanted to define a method for running a PowerShell script and a public property for the PowerShell instance being used: A first implementation So a first implementation of […]
[HOWTO] Execute C# build from PowerShell on Jenkins
At d-fens we usually use JetBrains TeamCity as a build server. Because one of our customers uses Jenkins as build server I had the chance to set up a build job for one of our C#/.NET projects on Jenkins. The project I mentioned is a C#/.NET Web Application built with Visual Studio 2013. For testing we make use of the […]
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