Simple MD5 checksum to see if the local file hash matches the declared remote md5 checksum

verify-download.ps1

$url = "http://dist.nuget.org/win-x86-commandline/latest/nuget.exe"
$output = "$PSScriptRoot\nuget.exe"

$headRequest = Invoke-WebRequest -Method head -Uri $url
$remotehash = $headRequest.Headers.'Content-MD5'

Invoke-WebRequest -Uri $url -OutFile $output

$fileData = Get-FileHash -Path $output -Algorithm MD5
$bytes  = [System.Text.Encoding]::UTF8.GetBytes($fileData.Hash)
$localhash = [System.Convert]::ToBase64String($bytes)

$remotehash
$localhash