InstallNetFramework472.ps1

#Requires -Version 3.0

<#
.DESCRIPTION
    Install .Net Framework 4.7.2 and then install .NET Core runtime
#>


[CmdletBinding()]
Param(
    [switch]$norestart
)

Set-StrictMode -Version Latest

$logFile = Join-Path $env:TEMP -ChildPath "InstallNetFx472ScriptLog.txt"

# Check if the latest NetFx472 version exists
$netFxKey = Get-ItemProperty -Path "HKLM:\SOFTWARE\\Microsoft\\NET Framework Setup\\NDP\\v4\\Full\\" -ErrorAction Ignore

$ret = -1
if($netFxKey -and $netFxKey.Release -ge 461808) {
    "$(Get-Date): The machine already has NetFx 4.7.2 or later version installed.  Skipping." | Tee-Object -FilePath $logFile -Append
    $ret = 0
} else {
    # Download the latest NetFx472
    $setupFileSourceUri = "https://download.microsoft.com/download/0/5/C/05C1EC0E-D5EE-463B-BFE3-9311376A6809/NDP472-KB4054531-Web.exe"
    $setupFileLocalPath = Join-Path $env:TEMP -ChildPath "NDP472-KB4054531-Web.exe"

    "$(Get-Date): Start to download NetFx 4.7.2 to $setupFileLocalPath." | Tee-Object -FilePath $logFile -Append

    if(Test-Path $setupFileLocalPath)
    {
        Remove-Item -Path $setupFileLocalPath -Force
    }

    $webClient = New-Object System.Net.WebClient

    $retry = 0

    do
    {
        try {
            $webClient.DownloadFile($setupFileSourceUri, $setupFileLocalPath)
            break
        }
        catch [Net.WebException] {
            $retry++

            if($retry -gt 3) {
                "$(Get-Date): Download failed as the network connection issue. Exception detail: $_" | Tee-Object -FilePath $logFile -Append
                break
            }

            $waitInSecond = $retry * 30
            "$(Get-Date): It looks the Internet network is not available now. Simply wait for $waitInSecond seconds and try again." | Tee-Object -FilePath $logFile -Append
            Start-Sleep -Second $waitInSecond
        }
    } while ($true)


    if(!(Test-Path $setupFileLocalPath))
    {
        "$(Get-Date): Failed to download NetFx 4.7.2 setup package." | Tee-Object -FilePath $logFile -Append
        exit -1
    }

    # Install NetFx472
    $setupLogFilePath = Join-Path $env:TEMP -ChildPath "NetFx472SetupLog.txt"
    if($norestart) {
        $arguments = "/q /norestart /serialdownload /log $setupLogFilePath"
    }
    else {
        $arguments = "/q /serialdownload /log $setupLogFilePath"
    }
    "$(Get-Date): Start to install NetFx 4.7.2" | Tee-Object -FilePath $logFile -Append
    $process = Start-Process -FilePath $setupFileLocalPath -ArgumentList $arguments -Wait -PassThru

    if(-not $process) {
        "$(Get-Date): Install NetFx failed." | Tee-Object -FilePath $logFile -Append
    }
    else {
        $exitCode = $process.ExitCode

        # 0, 1641 and 3010 indicate success. See https://msdn.microsoft.com/en-us/library/ee390831(v=vs.110).aspx for detail.
        if($exitCode -eq 0 -or $exitCode -eq 1641 -or $exitCode -eq 3010) {
            "$(Get-Date): Install NetFx succeeded with exit code : $exitCode." | Tee-Object -FilePath $logFile -Append
            $ret = 0
        }
        else {
            "$(Get-Date): Install NetFx failed with exit code : $exitCode." | Tee-Object -FilePath $logFile -Append
        }
    }
}

# now install .NET Core
& ./Install-DotnetVMSS.ps1
exit $ret