1. Create a new project and add RadGridView
2. Setup a column groups view
3. Set the ShowHeader property to false for one of the column groups
4. Set also the PinPosition to Left for the same column group
5. Run the project

In hierarchical mode, when a filtering cell is edited and expanded row appear, the cell closes its editor.

IMPROVE. RadGridView - AllowFiltering property for a column, should hide its filter operator text

One should be able to remove the grouping by dropping a group item on a grid row.

Generating hierarchy with related objects is not working properly. There are no items in second level.

The combobox column should get its value according to its DisplayMember property

Drag and drop of columns to the Column Chooser and columns reordering do not work in ColumnGroupsViewDefinition.

Char type filtering should be allowed for all filtering operators supported by the string type (except: StartsWith, EndsWith, Contains and NotContains)

Currently RadGridView does not show error indication when the ErrorProvider.SetError method is called

In self-referencing hierarchy of RadGridView, the first column that contains the row expander is not sized correctly when the BestFitColumns is performed.

When the excel-like filtering is enabled, the user should be allowed to change the context menu by subscribing for the corresponding event that allows replacing the menu.

When the suggest auto-complete mode of GridViewComboBox is enabled, the RadDropDownListEditor does not perform auto-complete operation when the edit mode is enabled by key stroke.

When AllowColumnReorder is false (and grouping is also turned off) dragging operation should not start.

If the RadGridView is in multi-select mode, many rows are selected when scrolling is performed by mouse dragging.

The ArgumentOutOfRangeException is thrown when the user tries to resize a column in RadGridView with applied auto-size columns fill mode.

When you add new row to RadGridView and it does not obey the filtering condition, the scroll bar is updated incorrectly.

When GridViewComboBoxColumn is bind to data source of type dictionary, the NullReferenceException is thrown.

The BestFitColumns algorithm should be performed for columns groups in ColumnGroupsViewDefinition.

The property builder closes when you select a child template and remove it from the tree

- Create a new project 
- Add RadGridView
- Setup a mixed hierarchy mode
- Expand several nodes so the vertical scrollbar appears
- Scroll down