ShareX Portable 13.7.0 Development Test 1

The platform is using directory detection for earlier versions. For version 5 and 6, it looks like you can check for a registry value. HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\hostfxr\Version will contain the version for 32-bit .NET (5.0.13, 6.1, etc). And switch to x64 for the 64-bit version. We'll need to do a VersionCompare on it.

I tested this on Windows 7, Windows 8.1, and Windows 10 in 32-bit and 64-bit with 5.0.12, 5.0.13, and 6.0.1 both 32-bit and 64-bit and it was consistent. On Windows 8, we can error and say to do the free update to 8.1.

All that said, as neither .NET 5 or 6 is a Windows component, Microsoft has said they won't ship with Windows. Nor are they updated via Windows Update. They are updated via Microsoft Update but the initial install won't be. Most software developers seem to be going the bundle route or including the appropriate .NET installer as part of their installer. A rather huge waste of disk space.