public class ContextStorage
{

[ThreadStatic]
private static Dictionary threadContext = new Dictionary();

public static bool IsWebContext()
{
try
{
return (HttpContext.Current != null);
}
catch (HttpException) { }
return false;
}

public static IDictionary Items
{
get
{
return IsWebContext() ? HttpContext.Current.Items : threadContext;
}
}

}