[InvalidOperationException: La séquence contient plusieurs éléments.]
System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult) +1164
System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries) +120
System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) +353
System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute(Expression expression) +54
System.Linq.Queryable.SingleOrDefault(IQueryable`1 source) +212
Agora.Inscription.Repository.GenericRepository`1.GetById(Expression`1 predicate) +244
Agora.Inscription.Service.MultiSiteService.GetSiteByAddress(String Address) +1092
Agora.Inscription.ClientDefaultControl.Page_Init(Object sender, EventArgs e) +862
System.Web.UI.Control.OnInit(EventArgs e) +79
System.Web.UI.UserControl.OnInit(EventArgs e) +108
System.Web.UI.Control.InitRecursive(Control namingContainer) +390
System.Web.UI.Control.AddedControl(Control control, Int32 index) +204
System.Web.UI.ControlCollection.Add(Control child) +157
Agora.Inscription.PL._Default.BindUserControl() +238
Agora.Inscription.PL._Default.Page_Init(Object sender, EventArgs e) +207
System.Web.UI.Control.OnInit(EventArgs e) +79
System.Web.UI.Page.OnInit(EventArgs e) +12
System.Web.UI.<InitRecursiveAsync>d__225.MoveNext() +552
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +102
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +64
System.Web.Util.WithinCancellableCallbackTaskAwaiter.GetResult() +30
System.Web.UI.<ProcessRequestMainAsync>d__523.MoveNext() +2552
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