Private/Test-UnicodeInString.ps1

function Test-UnicodeInString {
    <#
        .SYNOPSIS
        Test if a string contains non-ASCII characters
     
        .DESCRIPTION
        Test if a string contains non-ASCII characters, returns true if it does, false if it does not. This function can be used to provide the correct character encoding for the different web cmdlets.
    #>

        param(
            $String
        )

        [regex]::IsMatch($String, "[^\u0020-\u007F]")
    }