Traditionally, Microsoft technology has been an all-or-nothing affair. If you want C# you also get IIS, SQL Server, Windows, Azure, Visual Studio, Windows on your dev machine and I wouldn't be surprised if Exchange shows up somehow. You could use Mono, but then you were off the beaten path and on your own. When something new appeared from outside Microsoft, such as git, it wouldn't fit into the MS ecosystem for a while.

Now Microsoft seems to be changing its culture, but I can understand if people are weary.