Use attached to reproduce:

1. Click the button

2. Change the tab and go back to the diagram

Workaround:

Add the layout before showing the form

When there are no data rows in the grid the new row is current and the message is not displayed. In some themes, the grid looks like there is a single row which is confusing to the end users. 

Workaround: 

ArgumentNullExceptionn in the RadPropertyValuesCollection class.

Currently, the DashStyle cannot be changed.

The issue can be reproduced by setting the AssociatedControl property in the designer and later at run-time.

How to reproduce: check the attached video
Workaround: select a color from a different tab or use the color picker

Use attached to reproduce (the orientation must be set at design time)

Workaround:

Set it in code:

commandBarToggleButton2.Orientation = Orientation.Vertical

Workaround: additionally call the Select method of the text box element

Private Sub RadPageView1_SelectedPageChanged(sender As Object, e As EventArgs)
    If Me.RadPageView1.SelectedPage Is Me.RadPageViewPage1 Then
        Me.RadTextBoxControl1.Select()
        Me.RadTextBoxControl1.TextBoxElement.Select(0, 0)
    End If
End Sub

Other themes are also missing the IsSelected state, the fix should also handle them.

The issue can be observed in themes having shadows:

- Material 

- Fluent

LineSeries lineSeries = new LineSeries();
lineSeries.DataPoints.Add(new CategoricalDataPoint(6, DateTime.Now));
lineSeries.DataPoints.Add(new CategoricalDataPoint(4, DateTime.Now.AddDays(1)));
lineSeries.DataPoints.Add(new CategoricalDataPoint(7, DateTime.Now.AddDays(2)));
lineSeries.DataPoints.Add(new CategoricalDataPoint(5, DateTime.Now.AddDays(3)));
lineSeries.DataPoints.Add(new CategoricalDataPoint(3, DateTime.Now.AddDays(4)));
lineSeries.DataPoints.Add(new CategoricalDataPoint(8, DateTime.Now.AddDays(5)));
lineSeries.DataPoints.Add(new CategoricalDataPoint(7, DateTime.Now.AddDays(6)));
lineSeries.DataPoints.Add(new CategoricalDataPoint(10, DateTime.Now.AddDays(7)));
lineSeries.DataPoints.Add(new CategoricalDataPoint(4, DateTime.Now.AddDays(8)));
lineSeries.DataPoints.Add(new CategoricalDataPoint(5, DateTime.Now.AddDays(9)));
lineSeries.DataPoints.Add(new CategoricalDataPoint(2, DateTime.Now.AddDays(10)));

DateTimeContinuousAxis continuousAxis = new DateTimeContinuousAxis();
continuousAxis.PlotMode = AxisPlotMode.OnTicks;
continuousAxis.LabelFormat = "{0:d}";
continuousAxis.ScaleBreakStyle = ScaleBreakStyle.Ragged;
lineSeries.HorizontalAxis = continuousAxis;
this.radChartView1.Series.Add(lineSeries);

DateTimeContinuousAxis horizontalAxis = radChartView1.Axes.Get<DateTimeContinuousAxis>(0);

AxisScaleBreak scaleBreakItem = new AxisScaleBreak();
scaleBreakItem.Name = "Item1";
scaleBreakItem.From = DateTime.Now.AddDays(3);
scaleBreakItem.To = DateTime.Now.AddDays(6);

To reproduce:

-double click an option in the MultiColumnCombobox editor and close the editor in the selected index changed event.

Using the RadDocumentEditor class, the users can change the margin of the current section. However, there isn't a method allowing them to change the default section margin of the document. 

Use attached to reproduce. 

One should not be able to use the ribbon bar buttons when a protected document is opened or the rich text editor is read-only. 

I need to tab though the form fields in RadPdfViewer instead of having to click in each one

To reproduce: 

-Open the FileExplorer example. 

- Resize the panel (see attached).

This will handle the scenario of having different image sets for different DPI.

See the attached screenshot

AutoCompleteSuggestHelper, Assembly: Telerik.WinControls.UI, Version=2019.1.117.40

 

Isnt the hilighted line (contains branch) very unoptimized.

https://rhale78.wordpress.com/2011/05/16/string-equality-and-performance-in-c/

Multiple ToLower string operation. Why not let the framework do the operation since you are always using ordinal?

optimized version: return item.Text.Contains(this.Filter, StringComparison.OrdinalIgnoreCase);

 

protected virtual bool DefaultFilter(RadListDataItem item)
    {
      switch (this.suggestMode)
      {
        case SuggestMode.StartWiths:
          return item.Text.StartsWith(this.Filter, this.StringComparison);
        case SuggestMode.Contains:
          if ((this.StringComparison & StringComparison.InvariantCultureIgnoreCase) == StringComparison.InvariantCultureIgnoreCase || (this.StringComparison & StringComparison.InvariantCultureIgnoreCase) == StringComparison.CurrentCultureIgnoreCase)
            return item.Text.ToLower().Contains(this.Filter.ToLower());
          return item.Text.Contains(this.Filter);
        default:
          return item.Text.StartsWith(this.Filter, this.StringComparison);
      }
    }