Document BreakForUserUnhandledException and DebuggerDisableUserUnhandledExceptionsAttribute

Author: tommcdon

xml/System.Diagnostics/Debugger.xml

@@ -218,8 +218,10 @@ Console.WriteLine("Hello, world.");
         <Parameter Name="exception" Type="System.Exception" Index="0" FrameworkAlternate="net-9.0" />
       </Parameters>
       <Docs>
-        <param name="exception">To be added.</param>
-        <summary>To be added.</summary>
+        <param name="exception">The user-unhandled exception.</param>
+        <summary>
+          <para>Signals a breakpoint to an attached debugger with the <paramref name="exception" /> details if a .NET debugger is attached with break on user-unhandled exception enabled and a method attributed with DebuggerDisableUserUnhandledExceptionsAttribute calls this method.</para>
+        </summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>

xml/System.Diagnostics/DebuggerDisableUserUnhandledExceptionsAttribute.xml

@@ -20,7 +20,9 @@
     </Attribute>
   </Attributes>
   <Docs>
-    <summary>To be added.</summary>
+    <summary>
+      <para>If a .NET Debugger is attached which supports the Debugger.BreakForUserUnhandledException(Exception) API, this attribute will prevent the debugger from breaking on user-unhandled exceptions when the exception is caught by a method with this attribute, unless BreakForUserUnhandledException is called.</para>
+    </summary>
     <remarks>To be added.</remarks>
   </Docs>
   <Members>