diff --git a/Asm65/Formatter.cs b/Asm65/Formatter.cs
index 984174b..8a0239f 100644
--- a/Asm65/Formatter.cs
+++ b/Asm65/Formatter.cs
@@ -1121,8 +1121,17 @@ namespace Asm65 {
             sb.Append(mHexDumpBuffer);
         }
 
+        /// <summary>
+        /// Formats up to 16 bytes of data and appends it to the StringBuilder.
+        /// </summary>
+        /// <param name="data">Reference to data.</param>
+        /// <param name="offset">Start offset.</param>
+        /// <param name="addr">Address to put at start of line.</param>
+        /// <param name="length">Number of bytes to format.</param>
+        /// <param name="sb">StringBuilder to append the data to.</param>
         public void FormatHexDump(byte[] data, int offset, int addr, int length,
                 StringBuilder sb) {
+            Debug.Assert(length <= 16);
             FormatHexDumpCommon(data, offset, addr, length);
             sb.Append(mHexDumpBuffer);
         }
diff --git a/SourceGen/SourceGen.csproj b/SourceGen/SourceGen.csproj
index 16567cc..bf803b3 100644
--- a/SourceGen/SourceGen.csproj
+++ b/SourceGen/SourceGen.csproj
@@ -491,11 +491,8 @@
   <ItemGroup>
     <Resource Include="Res\SourceGenIcon.ico" />
   </ItemGroup>
-  <ItemGroup>
-    <Resource Include="Res\AboutImage.png" />
-  </ItemGroup>
   <ItemGroup>
     <Resource Include="Res\RedX.png" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-</Project>
\ No newline at end of file
+</Project>