FluentTagBuilder.cs

public class FluentTagBuilder
{
    public TagBuilder InnerBuilder { get; private set; }

    public FluentTagBuilder(string tagName)
    {
        InnerBuilder = new TagBuilder(tagName);
    }

    public FluentTagBuilder AddCssClass(string cssClass)
    {
        InnerBuilder.AddCssClass(cssClass);
        return this;
    }

    public FluentTagBuilder GenerateId(string name)
    {
        InnerBuilder.GenerateId(name);
        return this;
    }

    public FluentTagBuilder MergeAttribute(string key, string value, bool replaceExisting = false)
    {
        InnerBuilder.MergeAttribute(key, value, replaceExisting);
        return this;
    }

    public FluentTagBuilder MergeAttributes<TKey, TValue>(IDictionary<TKey, TValue> attributes,
        bool replaceExisting = false)
    {
        InnerBuilder.MergeAttributes(attributes, replaceExisting);
        return this;
    }

    public FluentTagBuilder SetInnerText(string innerText)
    {
        InnerBuilder.SetInnerText(innerText);
        return this;
    }

    public override string ToString()
    {
        return InnerBuilder.ToString();
    }
}