diff --git a/MatroskaLib/MatroskaLib/MatroskaWriter.cs b/MatroskaLib/MatroskaLib/MatroskaWriter.cs
index 8806a97..4b148d7 100644
--- a/MatroskaLib/MatroskaLib/MatroskaWriter.cs
+++ b/MatroskaLib/MatroskaLib/MatroskaWriter.cs
@@ -8,7 +8,7 @@ namespace MatroskaLib;
 
 public static class MatroskaWriter
 {
-    public static void WriteMkvFile(MkvFile mkfFile)
+    public static void WriteMkvFile(MkvFile mkfFile, bool dryRun = false)
     {
         using var dataStream = File.Open(mkfFile.filePath, FileMode.Open);
         dataStream.Seek(0, SeekOrigin.Begin);
@@ -25,6 +25,7 @@ public static void WriteMkvFile(MkvFile mkfFile)
             offset, lsBytes);
 
         // Write modified changes to file
+        if (dryRun) return;
         dataStream.Seek(0, SeekOrigin.Begin);
         dataStream.Write(lsBytes.ToArray(), 0, lsBytes.Count);
     }
diff --git a/MkvReadCrawler/Program.cs b/MkvReadCrawler/Program.cs
index c778a0a..30bf708 100644
--- a/MkvReadCrawler/Program.cs
+++ b/MkvReadCrawler/Program.cs
@@ -28,7 +28,7 @@ static void Main(string[] args)
             try
             {
                 var lsFiles = MatroskaReader.ReadMkvFiles([mkvFile]);
-                MatroskaWriter.WriteMkvFile(lsFiles[0], true);
+                MatroskaWriter.WriteMkvFile(lsFiles[0], dryRun:true);
                 stringBuilder.AppendLine("Track count:" + lsFiles[0].tracks.Count);
             }
             catch (Exception e)