To Reproduce: 
1. Install Q2 2015 (version 2015.2.623) of Telerik UI Winforms on PC with Visual Studio 2008 
2. Start the VS2008 and create new VB Winforms project 
3. Drag and drop from toolbox any control (RadButton or RadGridView). 
4. Open smart tag and click Edit UI Elements 
5. Message box with error is shown 

Workaround: 
If is possible use Visual Studio 2010 or higher version.

To reproduce: 
1. Drag and drop RadPageView on the form
2. Add 2-3 pages 
3. Set the ViewType to Backstage
4. Open smart tag and press Delete key to edit the Item Area Width property. 
After pressing the key, the RadPageView is removed from form.  

The issue is observed in Visual Studio 2015 only. 

- Add RadRibbonForm
- Set the radRibbonBar1 RightToLeft property to YES at design time
- Close the designer and open it again -> another ribbon is showing up

Workaround: done set the ribbon's RightToLeft property, just set the RightToLeft property of the form itself.

How to reproduce: test the attached project with the latest version on a Windows 7 machine, notice that the font sizes are scaled, test the project with assemblies before  R2 2017 the fonts are not scaled

The issue is observed even with the RadControl.EnableDpiScaling property set to false. It would be expected that if the property was set to false, that the fonts would not be increased.

Workaround: change the fonts for each of the controls individually, the scaling can be calculated this way:
  Protected Overrides Sub OnShown(e As EventArgs)
        MyBase.OnShown(e)

        Dim dpi = NativeMethods.GetSystemDpi()
        Dim scale = dpi.X / 96.0
    End Sub

How to reproduce:
this.radTrackBar1.LabelStyle = Telerik.WinControls.UI.TrackBarLabelStyle.TopLeft;
this.radTrackBar1.TickStyle = Telerik.WinControls.Enumerations.TickStyles.TopLeft;

Workaround:
this.radTrackBar1.LabelStyle = Telerik.WinControls.UI.TrackBarLabelStyle.TopLeft;
this.radTrackBar1.TrackBarElement.BodyElement.ScaleContainerElement.BottomScaleElement.Visibility = ElementVisibility.Collapsed;

Workaround: create the ThemableColor this way

SetBordersCommandParameter bordersParam = new SetBordersCommandParameter();
System.Drawing.Color color = Color.Blue;
System.Windows.Media.Color mediaColor = System.Windows.Media.Color.FromArgb(color.A, color.R, color.G, color.B);
bordersParam.BorderColor = new ThemableColor(mediaColor);

How to reproduce: 
1. Use the following code to change the default style of the document:
StyleDefinition h2 = this.radRichTextBox.Document.Style;
h2.SpanProperties.FontFamily = new System.Windows.Media.FontFamily("Microsoft Sans Serif");
h2.SpanProperties.FontSize = Unit.PointToDip(8.25f);
h2.ParagraphProperties.SpacingAfter = 0;

h2 = radRichTextBox.Document.Style;
h2.SpanProperties.FontFamily = new System.Windows.Media.FontFamily("Microsoft Sans Serif");
h2.SpanProperties.FontSize = Unit.PointToDip(8.25f);
h2.ParagraphProperties.SpacingAfter = 0;

StyleDefinition hyperlinkStyle = this.radRichTextBox.Document.StyleRepository["Hyperlink"];
hyperlinkStyle.SpanProperties.FontFamily = new System.Windows.Media.FontFamily("Microsoft Sans Serif");
hyperlinkStyle.SpanProperties.FontSize = Unit.PointToDip(8.25f);

2. Add some text to the document

3. Add a hyperlink somewhere in the middle of the text

4. Start moving the caret so it moves over the hyperlink start

Observed: When on hyperlink start/end, the caret is with bigger size than the content

Expected: The caret should be with the size of the content

To reproduce:
public RadForm1()
{
    InitializeComponent();
    var a = new Author(null, "John");
    for (int i = 0; i < 20; i++)
    {
        radChat1.AddMessage(new ChatTextMessage("Item" + i, a, DateTime.Now.AddDays(-(20 - i))));
    }
    new Telerik.WinControls.RadControlSpy.RadControlSpyForm().Show();

    this.radChat1.ChatElement.MessagesViewElement.TimeSeparatorInterval = TimeSpan.FromDays(1);
}

You will notice that there is today in several places. 

Workaround:
this.radChat1.ChatElement.MessagesViewElement.TimeSeparatorInterval = TimeSpan.Zero;

var a = new Author(null, "Forest Gump");
for (int i = 0; i < 20; i++)
{
    radChat1.AddMessage(new ChatTextMessage("Item" + i, a, DateTime.Now.AddDays(-(20 - i))));

    ChatTimeSeparatorDataItem separator = new ChatTimeSeparatorDataItem(new ChatTimeSeparatorMessage(DateTime.Now.AddDays(-(20 - i))));
    radChat1.ChatElement.MessagesViewElement.Items.Add(separator);
}

Workaround: 

Import using a stream.

Added in the R3 2018 release: https://docs.telerik.com/devtools/winforms/forms-and-dialogs/form-converter

How to reproduce: create the following custom cell and notice that the collapsed elements would still occupy space inside the cell. Check the attached screenshot

public class PNUDFCellElement : GridDataCellElement
{
    public PNUDFCellElement(GridViewColumn column, GridRowElement row) : base(column, row)
    {
    }

    private CustomStackLayoutElement stack;
    private RadDropDownListElement radDropDownListElement;
    private RadDateTimeEditorElement radDateTimeEditorElement;
    private RadTextBoxControlElement radTextBoxElement;

    protected override void CreateChildElements()
    {
        base.CreateChildElements();
        stack = new CustomStackLayoutElement();
        stack.StretchHorizontally = true;
        stack.Orientation = Orientation.Horizontal;
        radDropDownListElement = new RadDropDownListElement();
        radDropDownListElement.DropDownStyle = Telerik.WinControls.RadDropDownStyle.DropDownList;
        radDropDownListElement.StretchHorizontally = true;
        radDateTimeEditorElement = new RadDateTimeEditorElement();
        radDateTimeEditorElement.StretchHorizontally = true;
        radTextBoxElement = new RadTextBoxControlElement();
        radTextBoxElement.StretchHorizontally = true;
        stack.Children.Add(radDropDownListElement);
        stack.Children.Add(radDateTimeEditorElement);
        stack.Children.Add(radTextBoxElement);
        this.Children.Add(stack);
    }

    protected override void SetContentCore(object value)
    {
        this.radDropDownListElement.Visibility = Telerik.WinControls.ElementVisibility.Collapsed;
        this.radTextBoxElement.Visibility = Telerik.WinControls.ElementVisibility.Collapsed;
        this.radDateTimeEditorElement.Visibility = Telerik.WinControls.ElementVisibility.Collapsed;

        this.DrawText = false;
        if (this.RowIndex % 3 == 0)
        {
            this.radDropDownListElement.Visibility = Telerik.WinControls.ElementVisibility.Visible;
            this.radDropDownListElement.Text = this.Value + "";
        }
        else if (this.RowIndex % 3 == 1)
        {
            this.radTextBoxElement.Visibility = Telerik.WinControls.ElementVisibility.Visible;
            this.radTextBoxElement.Text = this.Value + "";
        }
        else
        {
            this.radDateTimeEditorElement.Visibility = Telerik.WinControls.ElementVisibility.Visible;
        }

        base.SetContentCore(value);
    }
}

public class CustomDataColumn : GridViewDataColumn
{
    public CustomDataColumn(string fieldName) : base(fieldName)
    {
    }

    public override Type GetCellType(GridViewRowInfo row)
    {
        if (row is GridViewDataRowInfo)
        {
            return typeof(PNUDFCellElement);
        }
        return base.GetCellType(row);
    }
}

Workaround: use a custom StackLayoutElemetn
public class CustomStackLayoutElement : StackLayoutElement
{
    protected override void ArrangeHorizontally(SizeF finalSize)
    {
        RectangleF clientRect = this.GetClientRectangle(finalSize);
        float stretchableWidth = 0;
        int stretchableCount = 0;

        int nonStretchableItems = 0;

        foreach (RadElement element in this.Children)
        {
            if (element.Visibility == ElementVisibility.Collapsed)
            {
                continue;
            }

            if (element.StretchHorizontally)
            {
                stretchableCount++;
            }
            else
            {
                stretchableWidth += element.DesiredSize.Width;
                nonStretchableItems++;
            }
        }

        if (nonStretchableItems > 0)
        {
            stretchableWidth += ElementSpacing * (nonStretchableItems - 1);
        }

        int spacing = this.ElementSpacing;

        if (stretchableCount > 0)
        {
            stretchableWidth = (clientRect.Width - stretchableWidth) / stretchableCount;
            stretchableWidth -= spacing * stretchableCount;
        }

        ArrangeItemsHorizontaly(clientRect, finalSize, stretchableWidth, spacing);
    }

    protected override void ArrangeItemsHorizontaly(RectangleF clientRect, SizeF finalSize, float stretchableWidth, float spacing)
    {
        float x = clientRect.X;
        float y = clientRect.Y;

        List<RadElement> children = new List<RadElement>(this.Children);

        if (this.Comparer != null)
        {
            children.Sort(this.Comparer);
        }

        for (int i = 0; i < children.Count; i++)
        {
            RadElement element = null;

            if (this.RightToLeft && this.RightToLeftMode == RightToLeftModes.ReverseItems)
            {
                element = children[children.Count - i - 1];
            }
            else
            {
                element = children[i];
            }

            if (element.Visibility == ElementVisibility.Collapsed)
            {
                continue;
            }

            RectangleF proposedRect = new RectangleF(x, y, stretchableWidth, clientRect.Height);
            RectangleF finalRect = AlignRect(element, proposedRect);

            if (this.RightToLeft && this.RightToLeftMode == RightToLeftModes.ReverseOffset)
            {
                finalRect.X = finalSize.Width - x - finalRect.Width;
            }

            this.ArrangeElement(element, clientRect, finalRect, finalSize);

            x += finalRect.Width + spacing;
        }
    }
}

Deleting table right after merged fields are updated causes StackOverflowException.

my operating system win 10 64 bit. visual studio 2015. .net 4.6.1 installed. convert to telerik controls menu not showing

auto complete feature not working. i'm using unbound mode

Please refer to the attached sample project and screenshot. Expand a parent row and scroll to the last row of the child template.