Why is Version.Minor of Windows Phone OS 7.1 "10"?

A Mango phone (Windows Phone 7.5/Windows Phone OS 7.1) at my hand says "7.10.XXXX" when I executed the following code:

System.Environment.OSVersion.Version.ToString()

I expected "7.1.XXXX".

Why is the minor version number (the second number) "10" (not开发者_Python百科 "1")?

Is there any convention to interpret "10" as "1" ???

I haven't heard of any such convention; To clarify, this is how I understand it:

• In consumer/marketing land, Windows Phone Mango is Windows Phone 7.5.
• In developer land, the assemblies are Windows Phone 7.1, and more importantly the SDK is 7.1
• In OS Build land, 7.10.7720.68 is Mango RTM.

Having said that, you can equate 7.10.7720 to Mango / 7.1 / 7.5 - but 7.10.8200 has been spotted in the wild, but unconfirmed whether it's Tango or Mango.

To answer your question: Pretty sure there's no convention to read 10 as 1.