Get Version from NETworkManager executable (#447)

Rather than hardcode the version, get it from the NETworkManager executable

Author: mdawsonuk

build.ps1

@@ -1,4 +1,3 @@
-$Version = "2021.1.0"
 $IsPreview = $false
 
 $BuildPath = "$PSScriptRoot\Build"
@@ -21,6 +20,9 @@ if(-not(Test-Path -Path "$BuildPath\NETworkManager\NETworkManager.exe"))
     Write-Error "Could not find dotnet release build. Is .NET SDK 5.0 or later installed?" -ErrorAction Stop
 }
 
+# Get NETworkManager File Version
+$Version = [System.Diagnostics.FileVersionInfo]::GetVersionInfo("$BuildPath\NETworkManager\NETworkManager.exe").FileVersion
+
 # Cleanup WebView2Loader.dll (https://github.com/MicrosoftEdge/WebView2Feedback/issues/461)
 Remove-Item "$BuildPath\NETworkManager\arm64" -Recurse
 Remove-Item "$BuildPath\NETworkManager\x64" -Recurse
@@ -54,4 +56,4 @@ else {
 
 Get-ChildItem -Path $BuildPath | Where-Object {$_.Name.EndsWith(".zip") -or $_.Name.EndsWith(".exe")} | Get-FileHash 
 
-Write-Host "Build finished! All files are here: $BuildPath" -ForegroundColor Green
+Write-Host "Build finished! All files are here: $BuildPath" -ForegroundColor Green