How to find duplicate values in Excel

 >Open MS Excel

> Select one , two or more columns

> Click on "Conditional Formatting"

> Click on "Highlight cells rules"

> Click on "Duplicate Values"

How to play sounds in asp.net and javascript (beep sound)

In asp.net

  Console.Beep(); 

ref:- https://stackoverflow.com/questions/3502311/how-to-play-a-sound-in-c-net

Also in javascript we can convert mp3 file to base64

ref:- https://base64.guru/converter/encode/audio/mp3

https://stackoverflow.com/questions/35497243/how-to-make-a-short-beep-in-javascript-that-can-be-called-repeatedly-on-a-page

https://www.geeksforgeeks.org/how-to-make-a-beep-sound-in-javascript/

https://stackoverflow.com/questions/7620871/how-to-play-a-sound-with-js

https://stackoverflow.com/questions/21775563/playing-sound-inside-javascript-event

Spinner loader masking - bootstrap - with gif image

with bootstrap class 

 .spinner-grow{

           display: block;

              position: fixed;

              z-index: 1031; /* High z-index so it is on top of the page */

              top: 50%;

              right: 50%; /* or: left: 50%; */

        }

        .model {

            display: none;

            position: fixed;

            z-index: 1200;

            top: 0;

            left: 0;

            height:

Fetch API Javascript Post - How to get text from file in javascript

 https://stackoverflow.com/questions/49823763/handle-asmx-c-sharp-exception-with-fetch-api

https://stackoverflow.com/questions/51291831/fetch-api-call-causes-new-asp-net-session

https://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_api_fetch_easy

with ajax fetch api

https://stackoverflow.com/questions/60349890/jquery-async-await-ajax-call

https://stackoverflow.com/questions/27612372/how-to-await-the-ajax-request

<script>

getText("fetch_info.txt");

async function getText(file) {

  let myObject = await fetch(file);

  let myText = await myObject.text();

  document.getElementById("demo").innerHTML = myText;

}

or

CSS to background to black and loader by dev

 <body>

<div class="container1">

<div class="ring"></div>

        <div class="ring"></div>

        <div class="ring"></div>

        <p>Loading...</p>

</div>

</body>