From 0fb3f2fbb7ddf0a159c112ad010b926570a7a19f Mon Sep 17 00:00:00 2001
From: Teacup <git@teadev.xyz>
Date: Fri, 8 Aug 2025 17:08:19 -0700
Subject: [PATCH] fix: Adjust filestream length when writing chunks

---
 Dotnet/ScreenshotMetadata/PNGFile.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Dotnet/ScreenshotMetadata/PNGFile.cs b/Dotnet/ScreenshotMetadata/PNGFile.cs
index f592d8cf..82e124cc 100644
--- a/Dotnet/ScreenshotMetadata/PNGFile.cs
+++ b/Dotnet/ScreenshotMetadata/PNGFile.cs
@@ -100,6 +100,7 @@ public class PNGFile : IDisposable
         
         // Write new chunk, append rest of file
         var chunkBytes = chunk.GetBytes();
+        fileStream.SetLength(fileStream.Length + CHUNK_NONDATA_SIZE + chunk.Length);
         fileStream.Write(chunkBytes, 0, chunkBytes.Length);
         fileStream.Write(fileBytes, 0, fileBytes.Length);