I think that I was pretty productive with .NET in about 3 months (full time, not just a few hours a day). Took us less than 6 months to get a pretty good Framework in place (this is all WinForms, don't know much at all about WebForms).

~~Bonnie



>>That seems awfully optimistic to me, that after a week with a new language/tool one will be 50-75% as productive as with the old one you have been working with for years.
>
>Do you have any rough estimate? Half a year perhaps? Less? More? Assume that I can dedicate several hours a day to study the new language.
>
>From preliminary talks, I might have half a year available to learn the language - and I am simply a little nervous whether that is enough.