Html Helper不包含Highsoft的定义

Question

我使用asp.net mvc开发简单的web应用程序，将此软件包添加到我的nuget：

highsoft.web.mvc version 5.0.10.1

并尝试将图表添加到查看页面：

<script src="http://code.highcharts.com/highcharts.js"></script>
            <script src="https://code.highcharts.com/modules/exporting.js"></script>


            @(Html.Highsoft().GetHighcharts(
        new Highcharts
        {
            Chart = new Highsoft.Web.Mvc.Charts.Chart
            {
                PlotBackgroundColor = null,
                PlotBorderWidth = null,
                PlotShadow = new Shadow
                {
                    Enabled = false
                }
            },
            Title = new Title
            {
                Text = "Browser market shares at a specific website, 2014"
            },
            Tooltip = new Tooltip
            {
                PointFormat = "{series.name}: <b>{point.percentage:.1f}%</b>"
            },
            PlotOptions = new PlotOptions
            {
                Pie = new PlotOptionsPie
                {
                    AllowPointSelect = true,
                    Cursor = PlotOptionsPieCursor.Pointer,
                    DataLabels = new PlotOptionsPieDataLabels
                    {
                        Enabled = true,
                        Format = "<b>{point.name}</b>: {point.percentage:.1f} %"
                    }
                }
            },
            Series = new List<Series>
            {
                new PieSeries
                {
                    Name = "Browser Share",
                    Data = @ViewData["pieData"] as List<PieSeriesData>
                },

            }
        }
        , "chart")
            )

 但在这一行：

@(Html.Highsoft().GetHighcharts(

 得到这个错误：

  

Html Helper不包含Highsoft的定义

我该如何解决这个问题？谢谢。 完整的错误消息：

  

CS1929：＆＃39; HtmlHelper＆＃39;不包含的定义   ＆＃39; Highsoft＆＃39;和最好的扩展方法重载   ＆＃39; HtmlHelperExtensions.Highsoft（IHtmlHelper）＆＃39;需要一个接收器   输入＆＃39; IHtmlHelper＆＃39;