Gets the host application's version number.
Assembly: EnvDTE (in EnvDTE.dll)
The returned string has the following format:
The letter D represents a base-ten digit.
Literal characters include period (.), comma (,), and opening and closing parentheses.
A question mark (?) matches any character.
A plus sign (+) matches one or more occurrences of any character, in the above format description.
Brackets ([ ]) denote that the characters between the brackets are optional.
Note the space before the opening parenthesis.
An example result string:
2.45 (debug version)