ReadThroughputAsync: Adds XML comment to Database.ReadThroughputAsync definition

Microsoft.Azure.Cosmos/src/Resource/Database/Database.cs

@@ -103,7 +103,24 @@ public abstract Task<DatabaseResponse> DeleteAsync(
         /// <param name="requestOptions">The options for the throughput request.</param>
         /// <param name="cancellationToken">(Optional) <see cref="CancellationToken"/> representing request cancellation.</param>
         /// <returns>The throughput response.</returns>
-        /// <exception>https://aka.ms/cosmosdb-dot-net-exceptions</exception>
+        /// <exception>https://aka.ms/cosmosdb-dot-net-exceptions#typed-api</exception>
+        /// <exception cref="CosmosException">
+        /// This exception can encapsulate many different types of errors.
+        /// To determine the specific error always look at the StatusCode property.
+        /// Some common codes you may get when reading a client encryption key are:
+        /// <list type="table">
+        ///     <listheader>
+        ///         <term>StatusCode</term>
+        ///         <description>Reason for exception</description>
+        ///     </listheader>
+        ///     <item>
+        ///         <term>404</term>
+        ///         <description>
+        ///         NotFound - This means the database does not exist or has no throughput assigned.
+        ///         </description>
+        ///     </item>
+        /// </list>
+        /// </exception>
         /// <value>
         /// The provisioned throughput for this database.
         /// </value>