A potentially dangerous Request.Path value was detected from the client (&) mvc5

Question

i want to delete a image when tag a clicked, but i get this error

i have already used ValidateInput(false) but its not working

this is a view <a href="/Admin/DeleteImageCauses/1&6"> </a>

this is error

Server Error in '/' Application.
A potentially dangerous Request.Path value was detected from the client (&).
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: A potentially dangerous Request.Path value was detected from the client (&).

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[HttpException (0x80004005): A potentially dangerous Request.Path value was detected from the client (&).]
   System.Web.HttpRequest.ValidateInputIfRequiredByConfig() +11815921
   System.Web.PipelineStepManager.ValidateHelper(HttpContext context) +54

this is controller:

[ValidateInput(false)]
public ActionResult DeleteImageCauses(int ID, int img)
{
  return RedirectToAction("EditCauses", ID);
}

i have already used ValidateInput(false) but its not working