C# Online Compiler | .NET Fiddle

using System;
using System.ComponentModel.DataAnnotations;
using System.Collections.Generic;

namespace HelloWorldMvcApp
{
	public class SampleViewModel
	{
		public List<CarouselItemModel> CarouselItemList
		{
			get;
			set;
		}
	}

	public class CarouselItemModel
	{
		public string Title
		{
			get;
			set;
		}

		public string ImagePath
		{
			get;
			set;
		}
	}
}

@model HelloWorldMvcApp.SampleViewModel
@{
	Layout = null;
}

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>Bootstrap 4 Carousel</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>
<style>
.carousel{
    background: #2f4357;
    margin-top: 20px;
}
.carousel-item{
    text-align: center;
    min-height: 280px; /* Prevent carousel from being distorted if for some reason image doesn't load */
}
.carousel-item-inner {
	padding: 10px;
}
</style>
</head>
<body>

<div class="container-lg my-3">
    <div id="myCarousel" class="carousel slide" data-ride="carousel">
        <!-- Carousel indicators -->
        <ol class="carousel-indicators">
            <li data-target="#myCarousel" data-slide-to="0" class="active"></li>
            <li data-target="#myCarousel" data-slide-to="1"></li>
            <li data-target="#myCarousel" data-slide-to="2"></li>
			<li data-target="#myCarousel" data-slide-to="3"></li>
        </ol>
        <!-- Wrapper for carousel items -->
        <div class="carousel-inner">
			@if (Model.CarouselItemList.Count() > 0)
			{
				for (int i = 0; i < Model.CarouselItemList.Count; i += 2)
				{				
					var items = Model.CarouselItemList.Skip(i).Take(2).ToList();

                    <div class="carousel-item @(items[0] == Model.CarouselItemList[0] ? "active" : "")">
						
						<div class="row">
			
									<div class="col-md-6 carousel-item-inner">
										<h3>@items[0].Title</h3>
										<img src="@items[0].ImagePath" alt="">
									</div>

									@if (items.Count() > 1)
									{
										 <div class="col-md-6 carousel-item-inner">
											<h3>@items[1].Title</h3>
											<img src="@items[1].ImagePath" alt="">
										 </div>
									}
									else
									{
										 <div class="col-md-6">
										 </div>
									 }

							</div>
					</div>
				}
			}
        </div>
        <!-- Carousel controls -->
        <a class="carousel-control-prev" href="#myCarousel" data-slide="prev">
            <span class="carousel-control-prev-icon"></span>
        </a>
        <a class="carousel-control-next" href="#myCarousel" data-slide="next">
            <span class="carousel-control-next-icon"></span>
        </a>
    </div>
</div>
</body>
</html>

 
@model HelloWorldMvcApp.SampleViewModel
@{
    Layout = null;
}
​
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>Bootstrap 4 Carousel</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>
<style>
.carousel{
    background: #2f4357;
    margin-top: 20px;
}
.carousel-item{
    text-align: center;
    min-height: 280px; /* Prevent carousel from being distorted if for some reason image doesn't load */

using System;
using System.Web.Mvc;
using System.Collections.Generic;

namespace HelloWorldMvcApp
{
	public class HomeController : Controller
	{
		[HttpGet]
		public ActionResult Index()
		{
			var model = new SampleViewModel();
			model.CarouselItemList = new List<CarouselItemModel>()
			{new CarouselItemModel()
			{Title = "Title 1", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+1"}, new CarouselItemModel()
			{Title = "Title 2", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+2"}, new CarouselItemModel()
			{Title = "Title 3", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+3"}, new CarouselItemModel()
			{Title = "Title 4", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+4"}, new CarouselItemModel()
			{Title = "Title 5", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+5"}, new CarouselItemModel()
			{Title = "Title 6", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+6"}, new CarouselItemModel()
			{Title = "Title 7", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+7"}			};
			return View(model);
		}
	}
}

 
using System;
using System.Web.Mvc;
using System.Collections.Generic;
​
namespace HelloWorldMvcApp
{
    public class HomeController : Controller
    {
        [HttpGet]
        public ActionResult Index()
        {
            var model = new SampleViewModel();
            model.CarouselItemList = new List<CarouselItemModel>()
            {new CarouselItemModel()
            {Title = "Title 1", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+1"}, new CarouselItemModel()
            {Title = "Title 2", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+2"}, new CarouselItemModel()
            {Title = "Title 3", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+3"}, new CarouselItemModel()
            {Title = "Title 4", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+4"}, new CarouselItemModel()
            {Title = "Title 5", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+5"}, new CarouselItemModel()
            {Title = "Title 6", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+6"}, new CarouselItemModel()
            {Title = "Title 7", ImagePath = "https://dummyimage.com/300x200/000000/0011ff&text=Slide+7"}            };
            return View(model);
        }
    }
}

Grok AI Generated Code for GetInnermostString function