/// Manually load a Root certificate file(.pfx file)
/// </summary>
/// <param name="namePFXfile">Set the name(path) of the .pfx file. If it is string.Empty Root certificate file will be named as "rootCert.pfx" (and will be saved in proxy dll directory)</param>
/// <param name="password">Set a password for the .pfx file</param>
/// <param name="overwritePFXfile">true : replace an existing .pfx file if password is incorect or if RootCertificate==null</param>
/// <para>Set the name(path) of the .pfx file. If it is string.Empty Root certificate file will be named as "rootCert.pfx" (and will be saved in proxy dll directory)</para>