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

This happens when using custom object relational hierarchy

Currently the column virtualization is disabled in column groups view, which causes slow scrolling when using a large number of columns

Steps to reproduce:

1. Create a new RadGridView project and apply hierarchy
2. Set the AllowAddNewRow property for the second level to false
3. Set the EnableFiltering property for the second level to true 
4. Run the project and apply filtering at second level that hides all rows

Steps to reproduce:

1. Create a new project containing RadGridView
2. Set AddNewRowPosition property to Bottom
3. Handle the CellFormatting event for the last column and cancel it
4. Run the project

1. Create a new project with RadGridView and bind it
2. Add a button and on its click event start a timer and call the BeginEdit method of RadGridView
3. On timer tick event change the theme for the grid

1. Create a new project containing RadGridView
2. Set the VirtualMode property to true 
3. Set RowCount and ColumnColunt properties to 10
4. Set the EnableFiltering property to true
5. Run the project and apply filtering

Use the project in the support ticket to reproduce the issue.

1. Create a new project containing RadGridView
2. Set the MimimumSize and MaximumSize properties
3. Set the AutoSize property to true
4. Run the project and you will see that RadGridView is not in AutoSize mode

1. Create new project with RadGridView.
2. Set the SelectionMode to CellSelecitonMode.
3. Set the MultiSelect property to true.
4. Run the project, select some cells, right-click to show the context menu and select the Copy option.
5. Open a notepad and click Paste.

1. Create new project and add RadButton.
2. On button click show the same instance of RadColorDialog.
3. Before calling the ShowDialog method change the SelectedColor property to a random value.
4. Run the project and click the button several times.

1. Create a new project with RadGridView and bind it.
2. Use the cell Style property to add custom style to some cell.
3. Add a button and on button click call the Reset method of this style.
4. Run the application and click the button. You will see that the cell border is wrong.

1. Create a new project with RadGridView and setup binding
2. Enable filtering
3. On a button click call the PrintPreview method
4. Run the application and click the button
5. Close the print dialog and click on a cell

1. Create a new project and open a form at design time
2. Drop RadGridView on the form
3. Add some columns
4. Open the Columns collection for edit
5. Select a column
6. Select the FilterDescriptor property and try to show its dialog

1. Create a new project with RadGridView and bind it.
2. Setup column groups view.
3. Change some column and set the data source again on button click.
4. Run the project

It is necessary to implement GetHashCode to avoid collisions when using this object in dictionaries

1. Create a new project with RadGridView and bind it.
2. Add a button and when handling its Click event set the CurrentRow to null.
2. Run the project.
3. Start narrator.
4. Sort by some column.
5. Click the button.

steps to reproduce the bug:

1. run HtmlViewTest.exe
2. don't re-size the form (keep the horizontal scroll bar visible in grid)
3. keep editing column4 several times
4. System.NullReferenceException will be thrown

1. Create a new project with RadGridView and bind it.
2. Run the application.
3. Double click on a column to best fit.
4. Double click the same column twice

Use the ticket project:

- type in filtercell T2 the following text: test
- make no commit of the filter cell!
- click directly on the radbutton of the ribbonbar
- click in the filter cell of T2
- click in grid
- click in filter cell of T2
- click in grid