I'm just getting started with C# and often find myself going back to other projects and reusing some snippet of code in a new project.
Is there a good tool out there with which on can store all the little pieces of code they reuse again and again AND integrates with Visual Studio Express??
Visual studio has the concept of code snippets, under the tools menu there is a code snippets manager.
Almost forgot, to bring up the code snipped menu in code press CRTL+K+S.
Visual Studio Express is not legally extensible so I doubt there is a tool you can purchase or download that will integrate. However, snippy will help manage and create standard .snippet files for you, without integration.
It sounds like you may want to develop your own little framework that can be referenced by various projects.