Server Error in '/' Application.

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 124:                <div class="list_body list_zz">
Line 125:                    <ul class="cc">
Line 126:                        <%  foreach (SymptomEntity symptomEntity in SymptomLis)
Line 127:                       {
Line 128:                        %>

Source File: e:\wwwroot\\symptomList.aspx    Line: 126

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
   Treatment.Core.SymptomList.get_SymptomLis() +243
   ASP.symptomlist_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in e:\wwwroot\\symptomList.aspx:126
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +109
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +8
   System.Web.UI.Page.Render(HtmlTextWriter writer) +29
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +100
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3060

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272