I worked in a few corporates and they all seem to favour .Net (for obvious MS support/marketing/mgt related reasons) but most of the solutions seemed to be okay

I worked in a few corporates and they all seem to favour .Net (for obvious MS support/marketing/mgt related reasons) but most of the solutions seemed to be okay. Also I notice a trend that if you want to sell to corporates/companies they prefer .Net solutions as it ties in better with what they use (most business still uses MS, like it or not) and are more reluctant to go with opensource based solutions. What do you think?