To reproduce: use the following code snippet and refer to the attached gif file.

public Form1()
{
    InitializeComponent();
    this.radPropertyGrid1.SelectedObject = this;
    this.radPropertyGrid1.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
}

Workaround:

public Form1()
{
    InitializeComponent();
    this.radPropertyGrid1.CreateItemElement += radPropertyGrid1_CreateItemElement;
    this.radPropertyGrid1.SelectedObject = this;
    this.radPropertyGrid1.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
}

private void radPropertyGrid1_CreateItemElement(object sender, CreatePropertyGridItemElementEventArgs e)
{
    if (e.ItemElementType == typeof(PropertyGridItemElement))
    {
        e.ItemElementType = typeof(CustomPropertyGridItemElement);
    }
}

public class CustomPropertyGridItemElement : PropertyGridItemElement
{
    private bool isResizing;
    private Point downLocation;
    private int downWidth;

    protected override Type ThemeEffectiveType
    {
        get
        {
            return typeof(PropertyGridItemElement);
        }
    }

    private const int resizePointerOffset = 3;

    public override bool IsInResizeLocation(Point location)
    {
        return (location.X >= this.ControlBoundingRectangle.X + this.PropertyTableElement.ValueColumnWidth - resizePointerOffset &&
                location.X <= this.ControlBoundingRectangle.X + this.PropertyTableElement.ValueColumnWidth + resizePointerOffset);
    }

    protected override void OnMouseDown(MouseEventArgs e)
    {
        if (IsInResizeLocation(e.Location))
        {
            if (this.PropertyTableElement.IsEditing)
            {
                this.PropertyTableElement.EndEdit();
            }

            this.Capture = true;
            this.isResizing = true;
            this.downLocation = e.Location;
            this.downWidth = this.PropertyTableElement.ValueColumnWidth;
        }

        base.OnMouseDown(e);
    }

    protected override void OnMouseMove(MouseEventArgs e)
    {
        if (this.isResizing)
        {
            int delta = e.Location.X - downLocation.X;

            if (this.RightToLeft)
            {
                delta *= -1;
            }

            this.PropertyTableElement.ValueColumnWidth = downWidth - delta;
            return;
        }

        if (this.IsInResizeLocation(e.Location))
        {
            this.ElementTree.Control.Cursor = Cursors.VSplit;
        }
        else
        {
            this.ElementTree.Control.Cursor = Cursors.Default;
        }

        base.OnMouseMove(e);
    }

    protected override void OnMouseUp(MouseEventArgs e)
    {
        if (this.isResizing)
        {
            this.isResizing = false;
            this.Capture = false;
        }

        base.OnMouseUp(e);
    }
}

To reproduce: use the following code:

Items _items = new Items();

public Form1()
{
    InitializeComponent(); 

    radPropertyGrid1.SelectedObject = _items;
}

class Items
{
    [Description("A Bool Property")]
    public bool IsEnabled
    {
        get
        {
            return _isEnabled;
        }
        set
        {
            _isEnabled = value;
            RadMessageBox.Show("IsEnabled");
        }
    }
    private bool _isEnabled;

    [Description("A String Property")]
    public string Name
    {
        get { return _name; }
        set
        {
            _name = value;
            RadMessageBox.Show("Name");
        }
    }
    private string _name ;

}

Steps to perform:
1. Change the "Name" property and leave the editor active.
2. Click on the check box to change the "IsEnabled" property.

As a result you will notice that the "IsEnabled" setter is called before the "Name" setter.

Workaround:

Items _items = new Items();

public Form1()
{
    InitializeComponent(); 

    this.radPropertyGrid1.CreateItemElement += radPropertyGrid1_CreateItemElement;        
    radPropertyGrid1.SelectedObject = _items;
}

private void radPropertyGrid1_CreateItemElement(object sender, CreatePropertyGridItemElementEventArgs e)
{
    if (e.ItemElementType == typeof(PropertyGridCheckBoxItemElement))
    {
        e.ItemElementType = typeof(CustomPropertyGridCheckBoxItemElement);
    }
}

public class CustomPropertyGridCheckBoxItemElement : PropertyGridCheckBoxItemElement
{
    public CustomPropertyGridCheckBoxItemElement()
    {
        this.CheckBoxElement.ToggleStateChanging += CheckBoxElement_ToggleStateChanging;
    }

    private void CheckBoxElement_ToggleStateChanging(object sender, StateChangingEventArgs args)
    {
        if (this.PropertyTableElement.ActiveEditor != null && this.PropertyTableElement.SelectedGridItem != this.Data)
        {
            this.PropertyTableElement.EndEdit();
        }
    }

    protected override void DisposeManagedResources()
    {
        this.CheckBoxElement.ToggleStateChanging -= CheckBoxElement_ToggleStateChanging;

        base.DisposeManagedResources();
    }
}

Until the new feature is officially released please use the implementation in the attached project.

To reproduce:
- Add a property grid to a blank form set the selected object the the same form.
- Group the items and click several times to expand collapse the groups or items.
- you will notice that some of expanded/collapsed groups icon is in wrong state (same applies for the +/- sign of the properties).

To reproduce:
public Form1()
{
    InitializeComponent();
    this.radPropertyGrid1.Size = new System.Drawing.Size(272, 135);
    PropertyStoreItem intItem = new PropertyStoreItem(typeof(int), "Integer", 1);
    PropertyStoreItem showTrend = new PropertyStoreItem(typeof(bool), "ShowTrend", 0);
    PropertyStoreItem trendItem1 = new PropertyStoreItem(typeof(int), "TrendTypes", 0);
    // Case of Re-loading the previously Saved Trend Type
    PropertyStoreItem floatItem = new PropertyStoreItem(typeof(float), "Float", 1f,
        "Property storing a floating point value.");
    PropertyStoreItem stringItem = new PropertyStoreItem(typeof(string), "String", "Telerik",
        "Property storing a string value", "Telerik");
    PropertyStoreItem dockItem = new PropertyStoreItem(typeof(DockStyle), "Dock", DockStyle.Top,
        "Property containing DockStyle value", "Layout", false);
    RadPropertyStore store = new RadPropertyStore();
    store.Add(intItem);
    store.Add(showTrend);
    store.Add(trendItem1);
    store.Add(floatItem);
    store.Add(stringItem);
    store.Add(dockItem);
    this.radPropertyGrid1.SelectedObject = store;
   radPropertyGrid1.Items["TrendTypes"].Visible = false;
    this.radPropertyGrid1.PropertyValueChanged += radPropertyGrid1_ValueChanged;

}

private void radPropertyGrid1_ValueChanged(object sender, PropertyGridItemValueChangedEventArgs e)
{

    PropertyGridItem current = (PropertyGridItem)e.Item;
    if (current.Name == "ShowTrend")
    {
        bool val = Convert.ToBoolean(current.Value);
        radPropertyGrid1.Items["TrendTypes"].Visible = val;
    }

}

- There is no scrollbar when the item is shown.

Workaround:
radPropertyGrid1.PropertyGridElement.PropertyTableElement.Update(PropertyGridTableElement.UpdateActions.ExpandedChanged);

Please refer to the attached gif file demonstrating how to reproduce the error with the Demo application.

Workaround: change the DropDownStyle property to DropDownList:

private void radPropertyGrid1_EditorInitialized(object sender, PropertyGridItemEditorInitializedEventArgs e)
{
    PropertyGridDropDownListEditor editor = e.Editor as PropertyGridDropDownListEditor;
    if (editor!=null)
    {
        BaseDropDownListEditorElement editorElement = editor.EditorElement as BaseDropDownListEditorElement;
        editorElement.DropDownStyle = Telerik.WinControls.RadDropDownStyle.DropDownList;
    }
}

To reproduce: use a class with more than 100 properties for the RadPropertyGrid.SelectedObject. On RadButton.Click event set the RradPropertyGrid.PropertySort to PropertySort.CategorizedAlphabetical.

Please refer to the attached sample project.

When a property has a TypeConverter and a UITypeEditor attributes the PropertyGridUITypeEditor calls the TypeConverter methods with the context parameter equal to null.

When the SelectedObject contains sub-properties and a user expands a property the CreateItem event is not fired for sub items.

If one sets an empty RadPropertyStore to the SelectedObject property of a RadPropertyGrid and then adds items with a RadSortOrder attribute the items will still be sorted by their name.



WORKAROUNDS:

1. Populate the store before you set it to the property grid.

2. Add a dummy item to the store before you set it to the property grid and then remove it:
RadPropertyStore store = new RadPropertyStore();
store.Add(typeof(bool), "dummy", false);
this.radPropertyGrid1.SelectedObject = store;
store.RemoveAt(0);

3. After you add the first item to the store call the following method:
this.radPropertyGrid1.PropertyGridElement.PropertyTableElement.ListSource.CollectionView.EnsureDescriptors();

To reproduce: please refer to the attached sample project. Try to select a new value from the drop-down editor and press Yes from the message box.

Workaround: use the RadPropertyGrid.PropertyValueChanging event to confirm the property changing: 

private void radPropertyGrid1_PropertyValueChanging(object sender, Telerik.WinControls.UI.PropertyGridItemValueChangingEventArgs e)
{
    e.Cancel = (MessageBox.Show("Are you sure you want to change this?", "Question", MessageBoxButtons.YesNo) != DialogResult.Yes);
}

RadSpinEditor now supports null values. This functionality is relevant for the PropertyGridSpinEditor as well  http://docs.telerik.com/devtools/winforms/editors/spineditor/null-value-support

Steps to reproduce.

1. Drag a RadPropertyGrid to a form.
2. Set the selected object to a button for example.
3. Set the System.Threading.Thread.CurrentThread.CurrentUICulture to bg-BG for example
4. Run the project and try to edit the Size property. You will see that it is displayed in the format X;Y, but you have to enter string in the X,Y format otherwise you get an exception.

To reproduce:
- Add RadPropertyGrid to a form and set the theme to MaterialTeal. The issue is observed in the ThemeViewer as well.

Workaround:
radPropertyGrid1.PropertyGridElement.ToolbarElement.AlphabeticalToggleButton.TextWrap = true;
radPropertyGrid1.PropertyGridElement.ToolbarElement.CategorizedToggleButton.TextWrap = true;
//or

 radPropertyGrid1.PropertyGridElement.ToolbarElementHeight = 68;

FIX. RadPropertyGrid - setting the SelectedObject to something and then set it to a property store, does not remove the initial items

Workaround: clear the items prior setting the property store:
        this.radPropertyGrid1.PropertyGridElement.PropertyTableElement.ListSource.Clear();

To reproduce: -add a RadPropertyGrid and use the following code: radPropertyGrid.SelectedObject = new MyPropertyGridAdapter(node); PropertyValueChanging += new PropertyGridItemValueChangingEventHandler(OnPropertyValueChanging); private void OnPropertyValueChanging(object sender, PropertyGridItemValueChangingEventArgs e) { var form = new CommentActionForm(); if (form.ShowDialog() == System.Windows.Forms.DialogResult.OK) { var item = e.Item as PropertyGridItem; var pd = item.PropertyDescriptor as MyPropertyDescriptor; if (pd != null) { // Perform value change (affects database). } } else { e.Cancel = true; } } Workaround:when ending edit mode with Enter key you may use the following approach: public Form1() { InitializeComponent(); this.radPropertyGrid1.SelectedObject = new MyObject(10204, "Sample name", "Some descripion"); this.radPropertyGrid1.EditorRequired += radPropertyGrid1_EditorRequired; } private void radPropertyGrid1_EditorRequired(object sender, PropertyGridEditorRequiredEventArgs e) { PropertyGridItem propertyItem = e.Item as PropertyGridItem; e.Editor = new MyEditor(propertyItem); } public class MyObject { public int ID { get; set; } public string Name { get; set; } public string Description { get; set; } public MyObject(int iD, string name, string description) { this.ID = iD; this.Name = name; this.Description = description; } } public class MyEditor : PropertyGridTextBoxEditor { public string InitialValue { get; set; } public PropertyGridItem PropertyItem { get; set; } public MyEditor(PropertyGridItem item) : base() { this.PropertyItem = item; } public override void BeginEdit() { InitialValue = this.TextBoxEditorElement.Text; base.BeginEdit(); } } public class MyPropertyGrid : RadPropertyGrid { protected override bool ProcessDialogKey(Keys keyData) { if (this.ActiveEditor != null && this.ActiveEditor is MyEditor && keyData == Keys.Enter) { MyEditor editor = ((MyEditor)this.ActiveEditor); PropertyGridItem property = editor.PropertyItem; string initialValue = editor.InitialValue; DialogResult ds = RadMessageBox.Show("Are you sure?", "Title", MessageBoxButtons.OKCancel, RadMessageIcon.Question); if (ds == System.Windows.Forms.DialogResult.Cancel) { property.Value = initialValue; return false; } } return base.ProcessDialogKey(keyData); } }

When using a the following property store item:
this.PropertyStore.Add(typeof(Image) , "Test Image" , null );
the user cannot select an image via the BrowseEditor.