Как указать путь к dll c#?

Process[] processesByName = Process.GetProcessesByName("somename");
            Process selectedProcess = null;
            foreach (Process t in processesByName.Where(t => t.Modules.Cast<ProcessModule>().Any(each => each.FileName.EndsWith("somedll.dll"))))
            {
                selectedProcess = t;
            }
            //Если нашли
            if (selectedProcess != null)
            {
                IntPtr processHandle = WinApis.OpenProcess(1040, false, selectedProcess.Id);

[DllImport("kernel32.dll")]
    public static extern IntPtr OpenProcess(uint processAcces, bool bInheritHandle, int processId);