C# Imprimir PDF a una impresora en específico

string a = System.Environment.MachineName;

Process proc = new Process();

//"C:\\Program Files (x86)\\Adobe\\Acrobat Reader DC\\Reader\\AcroRd32.exe"

proc.StartInfo.FileName = adobePath;

//FilePath: c://test.pdf

proc.StartInfo.Arguments = @" /t /h " + "\"" + FilePath + "\"" + " " + "\"" + "Bullzip PDF Printer" + "\"";

proc.StartInfo.UseShellExecute = true;

proc.StartInfo.CreateNoWindow = true;

proc.Start();

Thread.Sleep(1000);

proc.WaitForInputIdle();

public static List<string> GetPrinterList()

{

    List<string> l = new List<string>();

    foreach (string printer in System.Drawing.Printing.PrinterSettings.InstalledPrinters)

    {

        l.Add(printer);

    }

    return l;

}

public static string GetDefaultPrinter()

{

    PrinterSettings settings = new PrinterSettings();

    return (settings.PrinterName);

}