Why is Visual Studio 2005 putting green dots in my code?

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I pressed a couple of keys and now some green points appear in my code:

...protected.override.void.Dispose(bool.disposing)
......{
....if.(disposing.&&.(components.!=.null))
....{
.........components.Dispose();
....}
....base.Dispose.(disposing);
.}

I press space bar key and a green point appears. The forms still run successfully, but this makes it difficult for me to write!