Mono Android Auto-Increment Manifest Version using PowerShell

PreBuildEvt_IncAndroidManifestVersion.ps1

param
(
    [string] $ProjectPath = "C:\SourceCode\TestApps\AndroidTestIt\AndroidTestIt"
)

process
{
    # Load the bootstrap file
    [xml] $xam = Get-Content -Path ($ProjectPath + "\Properties\AndroidManifest.xml")
    
    # Get the version from Android Manifest
    $version = Select-Xml -xml $xam  -Xpath "/manifest/@android:versionName" -namespace @{android="http://schemas.android.com/apk/res/android"}
    
    # Increment the version
    [double] $iVer = $version.Node.Value
    $version.Node.Value = ($iVer + 0.001)

    # Save the file
    $xam.Save($ProjectPath + "\Properties\AndroidManifest.xml")
}

Simply put the PreBuildEvt_IncAndroidManifestVersion.ps1 file in your project directory. Then go to Project Options > Custom Command, and create a Before Build event with the following properties:

Command: powershell.exe -File "PreBuildEvt_IncAndroidManifestVersion.ps1" ${ProjectDir}
Working Directory: ${ProjectDir}

Round brackets for $(ProjectDir) - threw me for a while - but thanks for this useful post :-)