Powershell Gui If Statement not working

I have a bit of powershell that im running on the click of a button to create an AD group with the name provided in the textbox. The true statement works but the false statment does not execute. My code is below:

    function Button_Click( )
{
    $Nameofgroup = $TextBox1.text

    if (Get-adgroup $nameofgroup)
    {
        [System.Windows.Forms.MessageBox]::Show(" $nameofgroup Already exists", "Alert")
        }
        else
    {
        [System.Windows.Forms.MessageBox]::Show(" $nameofgroup Created", "Alert")
            NEW-ADGroup –name $Nameofgroup –groupscope Global –path “OU=example,OU=example,DC=Example,DC=example,DC=example”
    }

If you would like to test this without using GUI you can use the below code instead.

$Nameofgroup = $TextBox1.text

if (Get-adgroup $nameofgroup)
{
    Write-host "Already Exists"
    }
    else
{
    Write-Host "Created Successfully"
        NEW-ADGroup –name $Nameofgroup –groupscope Global –path “OU=example,OU=example,DC=Example,DC=example,DC=example”
}

If you test the AD group creation code on it's own this works fine.

Please let me know if you have any ideas on how to fix this.

Thanks,

SG