Preserve zoom factor when setting RichTextBox RTF

Assigning to the RichTextBox.Rtf property resets the zoom factor to 1.0. This change saves and restores the original zoom factor after setting the RTF. Also updates the XML doc for maxLogLines to reflect the correct upper limit of 2048.

Author: vonhoff

Serilog.Sinks.RichTextBox.WinForms.Colored/Sinks/RichTextBoxForms/Extensions/RichTextBoxExtensions.cs

@@ -68,7 +68,7 @@ public static void SetRtf(this RichTextBox richTextBox, string rtf, bool autoScr
         private static void SetRtfInternal(RichTextBox richTextBox, string rtf, bool autoScroll)
         {
             richTextBox.Suspend();
-
+            var originalZoomFactor = richTextBox.ZoomFactor;
             var scrollPoint = new Point();
 
             if (!autoScroll)
@@ -78,6 +78,12 @@ private static void SetRtfInternal(RichTextBox richTextBox, string rtf, bool aut
 
             richTextBox.Rtf = rtf;
 
+            // Re-apply the zoom level, as assigning to the Rtf property resets it back to 1.0.
+            if (Math.Abs(richTextBox.ZoomFactor - originalZoomFactor) > float.Epsilon)
+            {
+                richTextBox.ZoomFactor = originalZoomFactor;
+            }
+
             if (!autoScroll)
             {
                 SendMessage(richTextBox.Handle, EM_SETSCROLLPOS, 0, ref scrollPoint);

Serilog.Sinks.RichTextBox.WinForms.Colored/Sinks/RichTextBoxForms/RichTextBoxSinkOptions.cs

@@ -32,7 +32,7 @@ public class RichTextBoxSinkOptions
         /// </summary>
         /// <param name="theme">The colour theme applied when rendering individual message tokens.</param>
         /// <param name="autoScroll">When <c>true</c> (default) the target control scrolls automatically to the most recent log line.</param>
-        /// <param name="maxLogLines">Maximum number of log events retained in the in-memory circular buffer and rendered in the control. Must be between 1 and 10,000 (default: 256).</param>
+        /// <param name="maxLogLines">Maximum number of log events retained in the in-memory circular buffer and rendered in the control. Must be between 1 and 2048 (default: 256).</param>
         /// <param name="flushInterval">Timeout, in milliseconds, after which buffered events are flushed to the control if a batch has not yet been triggered. Must be between 250ms and 30 seconds (default: 500ms).</param>
         /// <param name="outputTemplate">Serilog output template that controls textual formatting of each log event.</param>
         /// <param name="formatProvider">Optional culture-specific or custom formatting provider used when rendering scalar values; <c>null</c> for the invariant culture.</param>