Posts Tagged ‘dotnet’

Impressions during developing my first application with Mono and Gtk# (GtkSharp)

2012/09/30 Comments off

Why Mono? Why Gtk?

Over the past couple of years I have been developing C# ASP.NET enterprise applications. So I am quite comfortable with the Microsoft stack.

That answers the first question: Mono gives me C# and the .NET stack.

On the other hand I have been using linux as a desktop environment on my home machine for over a decade. I am comfortable with using linux as my primary OS.

That answers the second question: Mono gives me access to Gtk, the graphics library of gnome, which is the default “desktop” in many linux distributions.

The App

I want to synchronize different Git repositories semi-automatically using a Gui.

  • Default behaviour of the automation can be loaded via a Json file.
  • Each entry describes a repository set to be synchronized.

The app is located at

I also published a small demo application for gtk# and treeview:


Monodevelop vs Visual Studio

I’ll keep it brief: If you’re used to Visual Studio and ReSharper, Monodevelop does not come close. On the other hand Monodevelop is a full C# IDE which works with linux. And Monodevelop can be used cross-plattform.

Gtk# API

The Gtk# API is not your typical .NET library. You will very soon notice that the origins are C/C++. This takes some getting used to if you have a .NET background.

Typically there are no return values. Instead Gtk# methods very often use the “out” keyword in .NET because that comes closer to the C++ implementation using pointers.

Here is an example:

## Mono Gtk# Code
bool someBool = false;
if (listStore.GetIterFirst (out iter)) {
do {
someBool = (bool) listStore.GetValue (iter, 0);
} while (someBool && listStore.IterNext (ref iter));
return someBool;

## Pseudo-C# Code
return listStore.ToList().Any(s => s.MyBoolProp);

From the .NET side, I don’t like the Gtk# API. I prefer methods having return values. I guess it is a matter of tast. If it would really bother me, I would write some wrappers around… 😉

uNhAddIns patch for NHibernate 3.1

2011/10/05 Comments off

since most NuGet packages related to NHibernate come with NHibernate version (at the time of writing), I tried rebuilding uNhAddIns (commit #773) with the newer version of NHibernate.

My changes:

  • upgraded NHibernate to version (Iesi.Collections, NHibernate, NHibernate.ByteCode.Castle)
  • implemented new Interface method ‘IsProxy’ for IProxyFactoryFactory (CSLProxyFactoryFactory, ProxyFactoryFactory)

BTW: .NET is becoming more and more like Java… Who doesn’t love names like ‘IProxyFactoryFactory’? 😉

I did not update any tests.

Feel free to use this code (no licence).

My patch can be found at:

Patch at Google Code

App.Config: Order matters

2011/09/23 1 comment

Note to self:

Within an App/Web.config in .NET… The startup node must be the last node…

Example: Create a plain WPF application from Visual Studio 2010, add an App.Config file, and try building Option 1 and Option 2 below.

Option 1:

<?xml version="1.0" encoding="utf-8" ?>
  <startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup>
  <configSections />

This throws: “The type initializer for ‘System.Windows.Application’ threw an exception.”

Option 2:

<?xml version="1.0" encoding="utf-8" ?>
  <configSections />
  <startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup>


Do I want to read 2.5MB of

C:\Program Files (x86)\Microsoft Visual Studio 10.0\Xml\Schemas\DotNetConfig.xsd

? No.