Windows blue screen fix

I recently updated to Visual Studio 2012 Ultimate.
When i tried to open an existing SQL Server SQLCLR Project (*.sqlproj), it says that the sqlproj is incompatible with the version I am running.

How-i-fixed-it:
I installed the SQL Server Data Tools from http://msdn.microsoft.com/en-us/data/tools.aspx.

I found the solution here:

http://stackoverflow.com/questions/11906691/visual-studio-2012-csproj-and-sqlproj

and here:
http://www.comoke.com/index.php/2012/10/visual-studio-2012-database-project-sqlproj-project-type-not-supported/

and here:
http://blog.tentaclesoftware.com/archive/2013/02/11/visual-studio-2010-and-2012-sqlproj-interoperability.aspx

I have not been working with the Linq to SQL tool before and had to make some changes to an existing Visual Studio 2012 project. Some new colums were added to a database table and i needed to update the corresponding dbml file in the Visual Studio project.

How-i-fixed-it:
I found the solution here: http://stackoverflow.com/questions/1110171/how-to-update-linq-to-sql-dbml-file

Delete the modified tables from the designer, and drag them back onto the designer surface from the Database Explorer. I have found that, for this to work reliably, you have to:
a. Refresh the database schema in the Database Explorer (right-click, refresh)
b. Save the designer after deleting the tables
c. Save again after dragging the tables back.

One of my C# SQLCLR table valued function started to throw an exception with some recently added data to the database:

SQL Server Message 6260
system.overflowexception Arithmetic Overflow

How-i-fixed-it:
It turned out to be caused by a divison by 0 happening at runtime because of bad records in the data. I added some code to check for this which fixed the problem of the arithemtic overlow.

I was looking for a way / description how to upgrade an existing SQL Server 2000 database to SQL Server 2012.

How i fixed it:
SQL Server 2000 database has to be upgraded to 2005/2008 first.

If found the right hints how to do it in the SQL Server Forum here: http://social.msdn.microsoft.com/Forums/sqlserver/en-US/8ab5617e-0644-4434-96af-ebc04ba89f75/upgrading-from-sql-2000-to-2012-how

The procedure is described well in this document:
http://download.microsoft.com/download/9/5/3/9533501A-6F3E-4D03-A6A3-359AF6A79877/SQL_Server_2012_Upgrade_Technical_Reference_Guide_White_Paper.pdf

It says (page 241), that i have to first upgrade the database from 2000 to 2005/2008 and then to 2012.