/FotografieSystem.ArgumentNullException: Value cannot be null. Parameter name: key at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument) at System.Collections.Generic.Dictionary`2.FindEntry(TKey key) at System.Collections.Generic.Dictionary`2.ContainsKey(TKey key) at XTEND.Connector.FindType(String fullname) in c:\www\dynabyte.ch\App_Code\xtend\Connector.cs:line 239 at XTEND.Table.ToString(Boolean FormatAsExcel) in c:\www\dynabyte.ch\App_Code\xtend\Table.cs:line 99 at XTEND.Table.ToString() in c:\www\dynabyte.ch\App_Code\xtend\Table.cs:line 35 at System.Text.StringBuilder.AppendFormatHelper(IFormatProvider provider, String format, ParamsArray args) at System.String.FormatHelper(IFormatProvider provider, String format, ParamsArray args) at System.String.Format(String format, Object[] args) at XTEND.Content.ToString(xtNavigation page) in c:\www\dynabyte.ch\App_Code\xtend\Content.cs:line 116 at XTEND.CurrentPage.GetContent() in c:\www\dynabyte.ch\App_Code\xtend\CurrentPage.cs:line 293 at ASP.default_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in c:\www\dynabyte.ch\default.aspx:line 36