Add XML docs to core packages

src/Microsoft.AspNetCore.NodeServices/HostingModels/NodeInvocationInfo.cs

@@ -1,9 +1,24 @@
 namespace Microsoft.AspNetCore.NodeServices.HostingModels
 {
+    /// <summary>
+    /// Describes an RPC call sent from .NET code to Node.js code.
+    /// </summary>
     public class NodeInvocationInfo
     {
+        /// <summary>
+        /// Specifies the path to the Node.js module (i.e., .js file) relative to the project root.
+        /// </summary>
         public string ModuleName { get; set; }
+
+        /// <summary>
+        /// If set, specifies the name of CommonJS function export to be invoked.
+        /// If not set, the Node.js module's default export must itself be a function to be invoked.
+        /// </summary>
         public string ExportedFunctionName { get; set; }
+
+        /// <summary>
+        /// A sequence of JSON-serializable arguments to be passed to the Node.js function being invoked.
+        /// </summary>
         public object[] Args { get; set; }
     }
 }