diff --git a/docs/ai/test/article.md b/docs/ai/test/article.md
new file mode 100644
index 0000000000000..344e6f1087baf
--- /dev/null
+++ b/docs/ai/test/article.md
@@ -0,0 +1,64 @@
+---
+title: Test file
+dev_langs:
+- CSharp
+- VB
+---
+
+# Test file
+
+This article contains C# and VB snippets.
+
+## Modern ::: syntax
+
+With 'snippet' prefix:
+
+:::code language="csharp" source="snippets/program.cs" id="Snippet1":::
+:::code language="vb" source="snippets/program.vb" id="Snippet1":::
+
+Without 'snippet' prefix:
+
+:::code language="csharp" source="snippets/program.cs" id="1":::
+:::code language="vb" source="snippets/program.vb" id="1":::
+
+From ASPX file (with language="csharp" or language="vb"):
+
+:::code language="csharp" source="snippets/asp-cs.aspx" id="Snippet3":::
+:::code language="vb" source="snippets/asp-vb.aspx" id="Snippet3":::
+
+From ASPX file (with language="aspx"):
+
+:::code language="aspx" source="snippets/asp-cs.aspx" id="Snippet3":::
+:::code language="aspx" source="snippets/asp-vb.aspx" id="Snippet3":::
+
+From ASPX file (with language="aspx-csharp" or language="aspx-vb"):
+
+:::code language="aspx-csharp" source="snippets/asp-cs.aspx" id="Snippet3":::
+:::code language="aspx-vb" source="snippets/asp-vb.aspx" id="Snippet3":::
+
+## Legacy snippet syntax
+
+With 'snippet' prefix:
+
+[!code-csharp[Snippet1](snippets/program.cs#Snippet1)]
+[!code-vb[Snippet1](snippets/program.vb#Snippet1)]
+
+Without 'snippet' prefix:
+
+[!code-csharp[Snippet1](snippets/program.cs#1)]
+[!code-vb[Snippet1](snippets/program.vb#1)]
+
+From ASPX file (with language="csharp" or language="vb"):
+
+[!code-csharp[Snippet3](snippets/asp-cs.aspx#Snippet3)]
+[!code-vb[Snippet3](snippets/asp-vb.aspx#Snippet3)]
+
+From ASPX file (with language="aspx"):
+
+[!code-aspx[Snippet3](snippets/asp-cs.aspx#Snippet3)]
+[!code-aspx[Snippet3](snippets/asp-vb.aspx#Snippet3)]
+
+From ASPX file (with language="aspx-csharp" or language="aspx-vb"):
+
+[!code-aspx-csharp[Snippet3](snippets/asp-cs.aspx#Snippet3)]
+[!code-aspx-vb[Snippet3](snippets/asp-vb.aspx#Snippet3)]
diff --git a/docs/ai/test/snippets/asp-cs.aspx b/docs/ai/test/snippets/asp-cs.aspx
new file mode 100644
index 0000000000000..7ee4e3ed07576
--- /dev/null
+++ b/docs/ai/test/snippets/asp-cs.aspx
@@ -0,0 +1,27 @@
+<!-- <Snippet1> -->
+<%@ Page Language="C#" %>
+
+    <!DOCTYPE html
+        PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+    <script runat="server">
+  protected void Page_Load(object sender, EventArgs e)
+        {
+            <!-- <Snippet2> -->
+    StringBuilder sb = new StringBuilder();
+    String pathstring = Context.Request.FilePath.ToString();
+            sb.Append("Current file path = " + pathstring + "<br />");
+            sb.Append("File name = " + VirtualPathUtility.GetFileName(pathstring).ToString() + "<br />");
+            sb.Append("File extension = " + VirtualPathUtility.GetExtension(pathstring).ToString() + "<br />");
+            sb.Append("Directory = " + VirtualPathUtility.GetDirectory(pathstring).ToString() + "<br />");
+            Response.Write(sb.ToString());
+        <!-- </Snippet2> -->
+
+            <!-- <Snippet3> -->
+    StringBuilder sb2 = new StringBuilder();
+            <!-- </Snippet3> -->
+        }
+    </script>
+
+    </html>
+    <!-- </Snippet1> -->
diff --git a/docs/ai/test/snippets/asp-vb.aspx b/docs/ai/test/snippets/asp-vb.aspx
new file mode 100644
index 0000000000000..63d5006dda2d1
--- /dev/null
+++ b/docs/ai/test/snippets/asp-vb.aspx
@@ -0,0 +1,30 @@
+<!-- <Snippet1> -->
+<%@ Page Language="VB" %>
+
+    <!DOCTYPE html
+        PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+
+    <script runat="server">
+
+  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
+
+        <!-- <Snippet2> -->
+    Dim sb As New StringBuilder()
+    Dim pathstring As String = Context.Request.FilePath.ToString()
+        sb.Append("Current file path = " & pathstring & "<br />")
+        sb.Append("File name = " & VirtualPathUtility.GetFileName(pathstring).ToString() & "<br />")
+        sb.Append("File extension = " & VirtualPathUtility.GetExtension(pathstring).ToString() & "<br />")
+        sb.Append("Directory = " & VirtualPathUtility.GetDirectory(pathstring).ToString() & "<br />")
+        Response.Write(sb.ToString())
+        <!-- </Snippet2> -->
+
+        <!-- <Snippet3> -->
+    Dim sb2 As New StringBuilder()
+        <!--  </Snippet3> -->
+
+  End Sub
+
+    </script>
+
+    </html>
+    <!-- </Snippet1> -->
diff --git a/docs/ai/test/snippets/program.cs b/docs/ai/test/snippets/program.cs
new file mode 100644
index 0000000000000..39212baea0275
--- /dev/null
+++ b/docs/ai/test/snippets/program.cs
@@ -0,0 +1,15 @@
+// <Snippet1>
+int i;
+int j;
+
+// <Snippet2>
+int i;
+// <hi>
+int j;
+// </Snippet2>
+
+// <Snippet3>
+int i;
+int j;
+// </Snippet3>
+// </Snippet1>
diff --git a/docs/ai/test/snippets/program.vb b/docs/ai/test/snippets/program.vb
new file mode 100644
index 0000000000000..7634f23035ec6
--- /dev/null
+++ b/docs/ai/test/snippets/program.vb
@@ -0,0 +1,15 @@
+' <Snippet1>
+Dim i as Integer
+Dim j as Integer
+
+' <Snippet2>
+Dim i as Integer
+' <hi>
+Dim j as Integer
+' </Snippet2>
+
+' <Snippet3>
+Dim i as Integer
+Dim j as Integer
+' </Snippet3>
+' </Snippet1>
