In earlier version of Microsoft Visual Studio products if user in text editor hit CTRL+W editor will do select the word where is pointer. Does that keyboard shortcut exists still in Visual Studio 2010?
In Tools | Options | Environment | Keyboard enter "Word" into "Show commands containing" and see all commands associated with words.
Here the command Edit.SelectCurrentWord is assigned to Ctrl + W, but your setup might be different.
When using Resharper 'Shift + Ctrl + W' shortcut may be overriden and not working. Create new shortcut for Edit.SelectCurrentWord as 'Ctrl + W, Ctrl + W'. It works fine so you may use this and resharper shortcuts.
来源：https://stackoverflow.com/questions/3433730/in-visual-studio-how-to-select-word-in-text-editor-using-keyboard