Razor C# Example

CSharpish.cs

using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.RenderTree;

namespace Presentation.Elements
{
	public abstract class ElementBase : ComponentBase
	{
		readonly string _name;

		protected ElementBase(string name) => _name = name;

		[Parameter]
		public string StyleType { get; set; }

		[Parameter]
		public string InlineStyle { get; set; }

		[Parameter]
		public RenderFragment ChildContent { get; set; }

		protected override void BuildRenderTree(RenderTreeBuilder builder)
		{
			builder.OpenElement(0, _name);
			builder.AddAttribute(1, "class", StyleType);
			builder.AddAttribute(2, "style", InlineStyle);
			builder.AddContent(3, ChildContent);
			builder.CloseElement();
		}
	}

	public sealed class Paragraph : ElementBase
	{
		public Paragraph() : base("p") {}
	}

	public sealed class Container : ElementBase
	{
		public Container() : base("div") {}
	}
}

Using.razor

@using Presentation.Elements

<Paragraph StyleType="myClass">Hello World!</Paragraph>

<!--
The above will emit:
<p class="myClass">Hello World!</p>
-->