MVC3 how to use @ <text> </text> as an html helper parameter

I got a little lost with the creation of the MVC3 helper. I have a helper that simply creates a string with an expression that is passed as a parameter.

I want to use my htmlHelper as follows:

@Html.AddTableFormField(model => model.UserName, @<text>
        @Html.EditorFor(m => m.UserName)<span class="warning">Use only letters</span>
    </text>)

This is my HtmlHelper (some irrelevant code has been removed):

public static MvcHtmlString AddTableFormField<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> property, Expression<Func<TModel>> customFormat = null)
    {
        var metadata = ModelMetadata.FromLambdaExpression(property, htmlHelper.ViewData);

        string displayName = metadata.DisplayName;

        var propName = metadata.PropertyName;

        if (string.IsNullOrWhiteSpace(displayName))
            displayName = propName;

        MvcHtmlString htmlCustomFormat = null;

        if (customFormat != null)
        {
            var deleg = customFormat.Compile();
            htmlCustomFormat = new MvcHtmlString(deleg().ToString());
        }
        else
            htmlCustomFormat = htmlHelper.EditorFor(property);

        return new MvcHtmlString(string.Format("<tr>"+
                "<td class=\"form-label\">"+
                    "<label class=\"editor-label\" for=\"{0}\">{1}<label>"+
                "</td>"+
                "<td class=\"form-data\">"+
                    "{2}"+
                "</td>"+
            "</tr>",
            propName, displayName, htmlCustomFormat));
    }

I can’t even compile it because the parameter is @<text>...</text>not valid for HtmlHelper, because it is a “lambda expression” and cannot be converted to>

Can anyone help solve this problem? I just want to pass any type @<text></text>to my HtmlHelper, and it just compiles it and puts the MvcHtmlString into a formatted return.

DECISION:

, : ASP.Net MVC3 -

@<text></text> Func<object, HtmlHelper>!