/// <summary>
/// 根据ColorType生成对应的Bootstrap所适应的颜色class
/// </summary>
/// <param name="attributes">该元素设置的 HTML 特性。</param>
/// <param name="prefix">前缀，例如按钮是btn。</param>
/// <param name="color">颜色</param>
public static void BuildColorClass(this IDictionary <string, object> attributes, string prefix = null, ColorTypes color = ColorTypes.Primary)
{
attributes.AddOrMerge("class", " {0}{1} ".StringFormat(prefix, color.ToString().ToLower()));
}
