@model Project.Core.Page
@Html.MyHelper(p => new { p.Author.Name, p.Author.Location, p.Author.Age });

public static MvcHtmlString MyHelper<TModel,TProperty>(
    this HtmlHelper<TModel> helper,
    Expression<Func<TModel,TProperty>> expression) {
    foreach (var parameter in expression.???) {
        // helper.TextBoxFor(???)
        // TagBuilder("input").Attributes("name", expression.???)
    }
}

public static MvcHtmlString MyHelper<TModel,object>(
    this HtmlHelper<TModel> helper,
    Expression<Func<TModel,object>> expression) {

        var newExpression = expression.Body as NewExpression;
        TModel model = helper.ViewData.Model;

        foreach (MemberExpression a in newExpression.Arguments) {

            var propertyName = a.Member.Name;
            var propertyValue = GetPropertyValue<TModel>(model, a);

            // Do whatever you need to with the property name and value;

        }

    }

    private static object GetPropertyValue<T>(T instance, MemberExpression me) {

        object target;

        if (me.Expression.NodeType == ExpressionType.Parameter) {
            // If the current MemberExpression is at the root object, set that as the target.
            target = instance;
        }
        else {
            target = GetPropertyValue<T>(instance, me.Expression as MemberExpression);
        }

        // Return the value from current MemberExpression against the current target
        return target.GetType().GetProperty(me.Member.Name).GetValue(target, null);

    }

@Html.MyHelper(p => p.Author.Name, p => p.Author.Location, p => p.Author.Age);

// Overload for one property
MyHelper<TModel, TProperty1>(this ..., Expression<Func<TModel, TProperty1>> func1)

// Overload for two properties
MyHelper<TModel, TProperty1, TProperty2>(this ...,
   Expression<Func<TModel, TProperty1>> func1,
   Expression<Func<TModel, TProperty2>> func2)

@(Html.MyHelper(p)
    .Add(p => p.Author.Age)
    .Add(p => p.Author.LastName, "Last Name")
    .Build())

public static class Test
{
    public static Helper<TModel> MyHelper<TModel>(this HtmlHelper helper, TModel model)
    {
        return new Helper<TModel>(helper, model);
    }
}

public class Helper<TModel>
{
    private readonly HtmlHelper helper;
    private readonly TModel model;

    public Helper(HtmlHelper helper, TModel model)
    {
        this.helper = helper;
        this.model = model;
    }

    public Helper<TModel> Add<TProperty>(Expression<Func<TModel, TProperty>> expression)
    {
        // TODO
        return this;
    }

    public MvcHtmlString Build()
    {
        return new MvcHtmlString("TODO");
    }
}

@helper Print(string myvalue,string special="")
 {
   <pre> <input id="id" type="text" value ="@myvalue" data-val="@special"/> </pre>
 }

@model IEnumerable<MvcApplication1.Models.Author>
@{
   ViewBag.Title = "Authors";
}

<h2>Authors</h2>

@foreach(var auth in Model)
{
   @Templates.Print(auth.Name);
}

@model IEnumerable<MvcApplication1.Models.Book>
@{
    ViewBag.Title = "Books";
 }

<h2>Books</h2>

@foreach(var book in Model)
{
   @Templates.Print(book.Title,book.ISBN);
}