However just want to comment on integrating the source into your project. As it took me like 2 hours to get it done correctly.
First I need to remove all the packages that I've got from Nuget related to Ext.Net. Second I need to change the Build type to Any CPU (coz the source is default to x64, and my machine is 32bit), then I need to go through each sub-projects which depends on Ext.Net to reference to the new Ext.Net project. It took me long time because I don't know it was compiling as 64 bit image and the website keeps complaining about badimage.
Anyway thanks at last I can get a working code now.
Thanks I don't think these processes are unavoidable. I'm not complaining I just want to point it out what things to look for when they change from Nuget to the SVN source, which might help save a bit of time.