[NullReferenceException: Object reference not set to an instance of an object.]
System.Data.Linq.SqlClient.QueryConverter.VisitInvocation(InvocationExpression invoke) +1502531
System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +1329
System.Data.Linq.SqlClient.QueryConverter.VisitExpression(Expression exp) +34
System.Data.Linq.SqlClient.QueryConverter.VisitBinary(BinaryExpression b) +52
System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +591
System.Data.Linq.SqlClient.QueryConverter.VisitExpression(Expression exp) +34
System.Data.Linq.SqlClient.QueryConverter.VisitBinary(BinaryExpression b) +37
System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +591
System.Data.Linq.SqlClient.QueryConverter.VisitExpression(Expression exp) +34
System.Data.Linq.SqlClient.QueryConverter.VisitFirst(Expression sequence, LambdaExpression lambda, Boolean isFirst) +164
System.Data.Linq.SqlClient.QueryConverter.VisitSequenceOperatorCall(MethodCallExpression mc) +3389
System.Data.Linq.SqlClient.QueryConverter.VisitInner(Expression node) +1091
System.Data.Linq.SqlClient.QueryConverter.ConvertOuter(Expression node) +79
System.Data.Linq.SqlClient.SqlProvider.BuildQuery(Expression query, SqlNodeAnnotations annotations) +211
System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) +149
System.Data.Linq.Table`1.System.Linq.IQueryProvider.Execute(Expression expression) +46
System.Linq.Queryable.FirstOrDefault(IQueryable`1 source, Expression`1 predicate) +422
AoN2E.Heritages.Page_Load(Object sender, EventArgs e) +10501
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +25
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +42
System.Web.UI.Control.OnLoad(EventArgs e) +132
System.Web.UI.Control.LoadRecursive() +66
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2428
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