Update dotnet/README.md

MackinnonBuck · Copilot · web-flow · commit eea6ea532761 · 2026-03-12T09:33:39.000-07:00
Co-authored-by: Copilot &lt;175728472+Copilot@users.noreply.github.com&gt;
diff --git a/dotnet/README.md b/dotnet/README.md
@@ -276,7 +276,8 @@ await session.SendAsync(new MessageOptions
     {
         new UserMessageDataAttachmentsItemFile
         {
-            Path = "/path/to/image.jpg"
+            Path = "/path/to/image.jpg",
+            DisplayName = "image.jpg",
         }
     }
 });

Original file line number	Diff line number	Diff line change
`@@ -276,7 +276,8 @@ await session.SendAsync(new MessageOptions`
`276`	`276`	`{`
`277`	`277`	`new UserMessageDataAttachmentsItemFile`
`278`	`278`	`{`
`279`		`- Path = "/path/to/image.jpg"`
	`279`	`+ Path = "/path/to/image.jpg",`
	`280`	`+ DisplayName = "image.jpg",`
`280`	`281`	`}`
`281`	`282`	`}`
`282`	`283`	`});`