How to fix CWE 80 Veracode for ltLinkDoc.Text in asp.net

I'm working on a program, but veracode is detecting that part of my code is vulnerable to XSS CWE 80.

Here is the snippet that is being flagged:

ltLinkDoc.Text =
  '<script>$(window).bind("load", function(){ setTimeout(function() { ' +
  safeScript +
  " }, 100); });</script>";

Does anyone know why this part of the code is vulnerable, and how I can secure it?

Here is my full code:

Session.Remove("linkdoc");

var strWebDavJs = HttpUtility.JavaScriptStringEncode(strWebDav);

var generateLinkDialogJs = HttpUtility.JavaScriptStringEncode(
  (_settingPageInPopup != null
    ? _settingPageInPopup.GenerateLinkDialog
    : true
  ).ToString(),
);

var isShowSuccussfulOrFailedJs = HttpUtility.JavaScriptStringEncode(
  IsShowSuccussfulOrFailed,
);

var isDocOrDestCheckedJs = HttpUtility.JavaScriptStringEncode(
  rdoDocumentInfile.Checked || IsDestinationFileChecked() ? "true" : "",
);

var safeScript = string.Format(
  'CloseAndSendLinkToParent("{0}", "{1}", "{2}", "{3}");',
  strWebDavJs,
  generateLinkDialogJs,
  isShowSuccussfulOrFailedJs,
  isDocOrDestCheckedJs,
);

ltLinkDoc.Text =
  '<script>$(window).bind("load", function(){ setTimeout(function() { ' +
  safeScript +
  " }, 100); });</script>";