fixed #827

src/Shared/HandyControl_Shared/Tools/Helper/TextHelper.cs

@@ -0,0 +1,30 @@
+using System.Globalization;
+using System.Windows;
+using System.Windows.Media;
+
+namespace HandyControl.Tools.Helper
+{
+    internal class TextHelper
+    {
+        public static FormattedText CreateFormattedText(string text, FlowDirection flowDirection, Typeface typeface, double fontSize)
+        {
+#if NET40 || NET45 || NET451 || NET452 || NET46 || NET461
+            var formattedText = new FormattedText(
+                text,
+                CultureInfo.CurrentUICulture,
+                flowDirection,
+                typeface,
+                fontSize, Brushes.Black);
+#else
+            var formattedText = new FormattedText(
+                text,
+                CultureInfo.CurrentUICulture,
+                flowDirection,
+                typeface,
+                fontSize, Brushes.Black, DpiHelper.DeviceDpiX);
+#endif
+
+            return formattedText;
+        }
+    }
+}