select_azure_subscription.ps1

function SelectSubscription () {
    $context=$null
    try {
        $context = Get-AzureRmContext
    } catch [ System.Management.Automation.PSInvalidOperationException] {}

    if ($context -eq $null) {
		$context = (Login-AzureRmAccount).Context
    }

    $subscription = Get-AzureRmSubscription | Out-GridView -Title "Select Azure Subscription" -PassThru
	if ($subscription -eq $null) {
		Throw "No subscription selected"
	}
	Set-AzureRmContext -SubscriptionId $subscription.SubscriptionId

	Write-Host "Welcome $($context.Account.Id) at $($subscription.SubscriptionName)"
}