Always show solution in Visual Studio

I installed Visual Studio Team System on my laptop. When i have created a new Solution you see this in your Solution Explorer. On your Solution you can now add projects. What i did is click right on the solution in the solution explorer and select "add new Project". After the creation of the project you only see the project in the solution explorer. To add a second project you can go to File -> new project. In that form you have to select "add to solution" and your "location of the project". (After that the solution is visible again.)
But you can set view "Always show solution" on like this:

• Select tools in menu
• options
• collapse tree structure and go to "Projects and Solutions"
• there you can activate "Always show Solution"