win universal app - Windows 10 get DeviceFamilyVersion

Question

I'm working windows 10 10240 Univasal windows app, when i use Windows.System.Profile.AnalyticsInfo.VersionInfo.DeviceFamilyVersion to get deivce version, it return a string "2814750438211605" instead of a version format (major.minor.revision.build). Anyone can tell me what the string "2814750438211605" means?

Answer 1

The Windows 10 OS version value is located in this string property:
Windows.System.Profile.AnalyticsInfo.VersionInfo.DeviceFamilyVersion

It returns string value like "2814750438211613".
To convert this long number to readable format use this:

string sv = AnalyticsInfo.VersionInfo.DeviceFamilyVersion;
ulong v = ulong.Parse(sv);
ulong v1 = (v & 0xFFFF000000000000L) >> 48;
ulong v2 = (v & 0x0000FFFF00000000L) >> 32;
ulong v3 = (v & 0x00000000FFFF0000L) >> 16;
ulong v4 = v & 0x000000000000FFFFL;
string version = $"{v1}.{v2}.{v3}.{v4}"; // == 10.0.10240.16413