Mostly used shortcut key in ASP.NET 2.0 for saving your timeCtrl+M+L to toggle all (collapse and explore) code block.
Ctrl+M+O to collapse region block
Ctrl+M+P to expand code block
CTRL+M+M to collapse the region your cursor is at whether its a method, namespace or whatever for collapsing code blocks, regions and methods.
CTRL+K+D to Format the current document in Visual Studio
CTRL+K+\ to Delete white spaces
CTRL+K+C to Comment code
CTRL+K+U to Uncomment code
CTRL+R+W to Display white spaces
CTRL+Shift+U to Uppercase selected code
CTRL+U to Lowercase selected co...