Back on March 27th, I posted the entry "Thread synchronization with Collections". That information came from a .Net Threading class I had taken that was taught by a very prominent .Net teacher (who’s initials are JR). The topic came up in class about how to safely assign to a dictionary entry. Somehow I had come away with the notion that mydictionary["mykey"] = value was thread safe. Apparently that was something that was brought up in class and was just never refuted. When I asked the instructor about it, he simply responded with "Dictionary is NOT thread-safe for any operation." (no comment was made about the fact that it was brought up in class).
Therefore, I have removed that posting. According to the MSDN: