Parameter count mismatch, Debug tips wanted

[Martin]

System.Reflection.TargetParameterCountException was caught
  HResult=-2147352562
  Message=Parameter count mismatch.
  Source=mscorlib
  StackTrace:
       at System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
       at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
       at System.Reflection.RuntimePropertyInfo.GetValue(Object obj, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture)
       at System.Reflection.RuntimePropertyInfo.GetValue(Object obj, Object[] index)
       at Telerik.Windows.Controls.Data.PropertyGrid.PropertySetViewModel.CollectPropertyValues(IEnumerable`1 items, List`1 propertyInfoValues, PropertySetPropertyInfo propertyInfo) in c:\TB\135\WPF_Scrum\Release_WPF\Sources\Development\Controls\Data\PropertyGrid\PropertySetViewModel.cs:line 114
       at Telerik.Windows.Controls.Data.PropertyGrid.PropertySetViewModel.DeterminePropertyValuesBase(IEnumerable`1 items) in c:\TB\135\WPF_Scrum\Release_WPF\Sources\Development\Controls\Data\PropertyGrid\PropertySetViewModel.cs:line 102
       at Telerik.Windows.Controls.Data.PropertyGrid.PropertySetViewModel.DeterminePropertyValues(IEnumerable`1 items) in c:\TB\135\WPF_Scrum\Release_WPF\Sources\Development\Controls\Data\PropertyGrid\PropertySetViewModel.cs:line 91
       at Telerik.Windows.Controls.Data.PropertyGrid.PropertySetViewModel..ctor(IEnumerable`1 items, PropertySetOperation operation) in c:\TB\135\WPF_Scrum\Release_WPF\Sources\Development\Controls\Data\PropertyGrid\PropertySetViewModel.cs:line 56
       at Telerik.Windows.Controls.RadPropertyGrid.RebindPropertyDefinitions(RadPropertyGrid propertyGrid) in c:\TB\135\WPF_Scrum\Release_WPF\Sources\Development\Controls\Data\PropertyGrid\RadPropertyGrid.cs:line 770
       at Telerik.Windows.Controls.RadPropertyGrid.<>c__DisplayClass7.<OnItemPropertyChanged>b__5(Object s, NotifyCollectionChangedEventArgs e) in c:\TB\135\WPF_Scrum\Release_WPF\Sources\Development\Controls\Data\PropertyGrid\RadPropertyGrid.cs:line 658
       at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
       at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item)
       at System.Collections.ObjectModel.Collection`1.Add(T item)
       at Propertydesigner.ViewModels.PropertyEditorViewModel.<.ctor>b__1(ObservableCollection`1 p) in d:\Projects\Source\eTray\Propertydesigner\Propertydesigner\ViewModels\PropertyEditorViewModel.cs:line 53
  InnerException:

I have only selected one object and it's the only one that PG chokes on until now everything works fine. 
Any debug tips?

[Maya]

Hi Martin,

Will it be possible to provide a bit more details - how you define your property grid, what the source is ? Could you get the same behavior on our demos ? What version of RadControls are you working with ?
Generally, any relevant information or code-snippets would be helpful.

All the best,
Maya
the Telerik team

[Martin]

OK I found the nasty cat

Replace:

public Row this[int rowIndex] { get { return _rows[rowIndex]; } }

With this:

[Browsable(false)]
 public Row this[int rowIndex] { get { return _rows[rowIndex]; } }

[Ivan Ivanov]

Hi,

 Thank you for reporting this issue to us. The exception will be fixed with the incoming service pack.

All the best,
Ivan Ivanov
the Telerik team