Skip to main content

C# error at compile time challenge

I have a challenge for you. You will find at the end of thispost a link to a zip that contains a .NET 4.0 projects. The challenge is tomake this project to compile and give me the cause of the problem. I will letyou until Friday morning.
Good luck.!259&authkey=!APfTPi6HWX0VJQg

In the ‘class’ word from the Foo class we had an odd character for Unicode world. The character named is ‘Zero with space’. Is like a space between words but without a visible space (width). Because Visual Studio can process also Unicode files, we have no limitation to add Unicode characters that are not visible using a normal editor. If we open the file with Total Commander viewer for example we will be able to see the character (in hex view for example).
Nice job :-)


  1. Hehe, simple one.

    When in doubt, retype the text. The problem is with the keyword "class". For example, if you put the cursor at the end of "class", and press CTRL+Left (that is, jump over one word), it will jump INSIDE the class, after the 'l' char.

    Looking at the source with a HEX Viewer we see:
    cl​ass . That is the ANSI representation. There is some UTF-8 garbage in there :)

    1. You are almost there. You need to tell me what is that character? What represents?

    2. U+200B

      Unicode line break:

      Probably from some weird editor/another operating system

    3. Nice - the file is UTF-16 encoded (big endian), that is ok.. Word has the habit to insert zero-width-spaces sometimes.. :)

  2. I think that the file is encoded in ANSI and the "a" character in "class" is "â" which isn't a latin character. The ANSI encoded file permits to use characters from other alphabets not only latins character.

  3. I added the solution to the post. Enjoy.


Post a Comment

Popular posts from this blog

How to check in AngularJS if a service was register or not

There are cases when you need to check in a service or a controller was register in AngularJS.
For example a valid use case is when you have the same implementation running on multiple application. In this case, you may want to intercept the HTTP provider and add a custom step there. This step don’t needs to run on all the application, only in the one where the service exist and register.
A solution for this case would be to have a flag in the configuration that specify this. In the core you would have an IF that would check the value of this flag.
Another solution is to check if a specific service was register in AngularJS or not. If the service was register that you would execute your own logic.
To check if a service was register or not in AngularJS container you need to call the ‘has’ method of ‘inhector’. It will return TRUE if the service was register.
if ($injector.has('httpInterceptorService')) { $httpProvider.interceptors.push('httpInterceptorService&#…

ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded

Today blog post will be started with the following error when running DB tests on the CI machine:
threw exception: System.InvalidOperationException: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' registered in the application config file for the ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application. See for more information. at System.Data.Entity.Infrastructure.DependencyResolution.ProviderServicesFactory.GetInstance(String providerTypeName, String providerInvariantName) This error happened only on the Continuous Integration machine. On the devs machines, everything has fine. The classic problem – on my machine it’s working. The CI has the following configuration:

TeamCity.NET 4.51EF 6.0.2VS2013
It seems that there …

Run native .NET application in Docker (.NET Framework 4.6.2)

The main scope of this post is to see how we can run a legacy application written in .NET Framework in Docker.

First of all, let’s define what is a legacy application in our context. By a legacy application we understand an application that runs .NET Framework 3.5 or higher in a production environment where we don’t have any more the people or documentation that would help us to understand what is happening behind the scene.
In this scenarios, you might want to migrate the current solution from a standard environment to Docker. There are many advantages for such a migration, like:

Continuous DeploymentTestingIsolationSecurity at container levelVersioning ControlEnvironment Standardization
Until now, we didn’t had the possibility to run a .NET application in Docker. With .NET Core, there was support for .NET Core in Docker, but migration from a full .NET framework to .NET Core can be costly and even impossible. Not only because of lack of features, but also because once you…