[ArgumentOutOfRangeException: 索引超出范围。必须为非负值并小于集合大小。
参数名: index]
System.Collections.Generic.List`1.get_Item(Int32 index) +14255744
wx.BLL.Sys.Class.GetTree(Nullable`1 Id, Nullable`1 LittleType, Boolean ByHasClass, Int32 lv, Class model) in E:\dot_project\git\wangxiao\BLL\Sys\Class.cs:384
wx.BLL.Sys.Class.GetTree(Nullable`1 Id, Nullable`1 LittleType, Boolean ByHasClass, Int32 lv, Class model) in E:\dot_project\git\wangxiao\BLL\Sys\Class.cs:383
wx.Know.Partial.Header.Page_Load(Object sender, EventArgs e) in E:\dot_project\git\wangxiao\wx.Know\Partial\Header.ascx.cs:20
System.Web.UI.Control.LoadRecursive() +71
System.Web.UI.Control.LoadRecursive() +190
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3178
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