diff --git a/xml/System.Text/Ascii.xml b/xml/System.Text/Ascii.xml
index a878643cffb..e4215063c4f 100644
--- a/xml/System.Text/Ascii.xml
+++ b/xml/System.Text/Ascii.xml
@@ -16,8 +16,8 @@
   </Base>
   <Interfaces />
   <Docs>
-    <summary>To be added.</summary>
-    <remarks>To be added.</remarks>
+    <summary>Provides helper methods for working with ASCII-encoded text as bytes or characters.</summary>
+    <remarks>For APIs that take both a source and a destination buffer, the behavior of the method is undefined if the source and destination buffers overlap, unless the description specifies otherwise. The behavior of all APIs is undefined if another thread mutates the buffers while these APIs are operating on them. All case-conversion APIs are culture-unaware.</remarks>
   </Docs>
   <Members>
     <Member MemberName="Equals">