foreach (var paragraph in this.document.EnumerateChildrenOfType<Paragraph>())
{
	HeightType? heightType = paragraph.Properties.LineSpacingType.GetActualValue();
	if (heightType == HeightType.Exact || heightType == HeightType.AtLeast) 
	{
		paragraph.Properties.LineSpacingType.LocalValue = Telerik.Windows.Documents.Flow.Model.Styles.HeightType.Auto;
		paragraph.Properties.LineSpacing.LocalValue = 2;
	}
}

    public void SpecialCharsTest()
        {
            RadFlowDocument document = new RadFlowDocument();

            RadFlowDocumentEditor editor = new RadFlowDocumentEditor(document);

            editor.InsertText("Before text");
            editor.InsertText("åäö ÅÄÖ ☕"); // This line will not appear in the pdf 
            editor.InsertText("After text");
            using (Stream output = new FileStream("specialCharTest.pdf", FileMode.OpenOrCreate))
            {
                PdfFormatProvider provider = new PdfFormatProvider();
                provider.Export(document, output);
            }
        }

string cultureName = Thread.CurrentThread.CurrentCulture.Name;
CultureInfo cultureInfo= new CultureInfo(cultureName);
if (cultureInfo.NumberFormat.NumberDecimalSeparator != ".")
{
    cultureInfo.NumberFormat.NumberDecimalSeparator = ".";
    Thread.CurrentThread.CurrentCulture = cultureInfo;
}

var tables = document.EnumerateChildrenOfType<Table>();

var border = new Border(1, BorderStyle.Single, new ThemableColor(Colors.Black));

foreach (var table in tables)
{
    table.Borders = new TableBorders(border);

    foreach (var row in table.Rows)
    {
        foreach (var cell in row.Cells)
        {
            cell.Borders = new TableCellBorders(border);
        }
    }
}

row.Height = new TableRowHeight(HeightType.Exact, image.Image.Height);