build.ps1

$DotNetChannel = 'preview';
$DotNetVersion = '2.0.0-preview2-006497';
$DotNetInstallerUri = 'https://raw.githubusercontent.com/dotnet/cli/v2.0.0-preview2/scripts/obtain/dotnet-install.ps1'

###########################################################################
# INSTALL .NET CORE CLI
###########################################################################

Function Remove-PathVariable([string]$VariableToRemove)
{
    $path = [Environment]::GetEnvironmentVariable("PATH", "User")
    if ($path -ne $null)
    {
        $newItems = $path.Split(';', [StringSplitOptions]::RemoveEmptyEntries) | Where-Object { "$($_)" -inotlike $VariableToRemove }
        [Environment]::SetEnvironmentVariable("PATH", [System.String]::Join(';', $newItems), "User")
    }

    $path = [Environment]::GetEnvironmentVariable("PATH", "Process")
    if ($path -ne $null)
    {
        $newItems = $path.Split(';', [StringSplitOptions]::RemoveEmptyEntries) | Where-Object { "$($_)" -inotlike $VariableToRemove }
        [Environment]::SetEnvironmentVariable("PATH", [System.String]::Join(';', $newItems), "Process")
    }
}

# Get .NET Core CLI path if installed.
$FoundDotNetCliVersion = $null;
if (Get-Command dotnet -ErrorAction SilentlyContinue) {
    $FoundDotNetCliVersion = dotnet --version;
}

if($FoundDotNetCliVersion -ne $DotNetVersion) {
    $InstallPath = Join-Path $PSScriptRoot ".dotnet"
    if (!(Test-Path $InstallPath)) {
        mkdir -Force $InstallPath | Out-Null;
    }
    (New-Object System.Net.WebClient).DownloadFile($DotNetInstallerUri, "$InstallPath\dotnet-install.ps1");
    & $InstallPath\dotnet-install.ps1 -Channel $DotNetChannel -Version $DotNetVersion -InstallDir $InstallPath;

    Remove-PathVariable "$InstallPath"
    $env:PATH = "$InstallPath;$env:PATH"
    $env:DOTNET_SKIP_FIRST_TIME_EXPERIENCE=1
    $env:DOTNET_CLI_TELEMETRY_OPTOUT=1
}

dotnet restore --source=https://api.nuget.org/v3/index.json ./build/build.vbproj
dotnet run --project=./build/build.vbproj
exit $LASTEXITCODE