private static Func <TComponent, TBuilder> GetCreator()
{
var builderType = typeof(TBuilder);
var componentType = typeof(TComponent);
var htmlStringType = typeof(HttpContext).Assembly.GetType("System.Web.IHtmlString");
var targetType = typeof(TBuilder);
if (htmlStringType != null)
{
// For .NET 4 define a dynamic type which implements IHtmlString in order to support <%: %>
targetType = DynamicTypeBuilder.GenerateType(builderType, new[] { htmlStringType });
}
var argumentExpression = Expression.Parameter(componentType, "component");
var constructor = targetType.GetConstructor(new Type[] { componentType });
var newExpression = Expression.New(constructor, argumentExpression);
return(Expression.Lambda <Func <TComponent, TBuilder> >(newExpression, argumentExpression).Compile());
}
