C# WinApp ขอคำแนะนำเรื่องการสุ่มค่าใน list หน่อยครับ

<button id="btnFucker" onclick="@(async () => await { IsTrue = !IsTrue})"></button>

<FuckerScript>
    <script>
        var jsFunctions = {};
        var jsObject = {Name: "Jimi", Age: 60, Salary: 1200.49}; // มันคือ System.Text.Json.JsonElement
        jsFunctions.calculateSquareRoot = function () {
            const number = prompt("Enter your number");

            DotNet.invokeMethodAsync("TestProgram", "CalculateSquareRoot", parseInt(number)) // TestProgram = Project Assembly Name
                .then(result => {
                    var el = document.getElementById("string-result");
                    el.innerHTML = result;
                });
        }

        jsFunctions.calculateSquareRootWithJustResult = function () {
            const number = prompt("Enter your number");

            DotNet.invokeMethodAsync("TestProgram", "CalculateSquareRootWithJustResult", parseInt(number), true, jsObject)
                .then(result => {
                    var el = document.getElementById("result");
                    el.innerHTML = result;
                });
        }

        jsFunctions.registerMouseCoordinatesHandler = function (dotNetObjRef) {
            function mouseCoordinatesHandler() {
                dotNetObjRef.invokeMethodAsync("ShowCoordinates",
                    {
                        x: window.event.screenX,
                        y: window.event.screenY
                    }
                );
            };

            mouseCoordinatesHandler();
            document.getElementById("coordinates").onmousemove = mouseCoordinatesHandler;
        }
    </script>
</FuckerScript>

window.onlineStatusIndicator = {

	registerOnlineStatusHandler: function (dotNetObjRef) {
		function onlineStatusHandler() {
			dotNetObjRef.invokeMethodAsync("SetOnlineStatusColor", navigator.onLine);
		};

		onlineStatusHandler();

		window.addEventListener("online", onlineStatusHandler);
		window.addEventListener("offline", onlineStatusHandler);
	}
};