Beginning angular2-aspnet NPM package

Microsoft.AspNet.AngularServices/npm/src/Exports.ts

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+export * from './Validation';

Microsoft.AspNet.AngularServices/npm/src/Validation.ts

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+import { ControlGroup } from 'angular2/angular2';
+import { Response } from 'angular2/http';
+
+export class Validation {
+    
+    public static showValidationErrors(response: ValidationErrorResult | Response, controlGroup: ControlGroup): void {
+        if (response instanceof Response) {
+            var httpResponse = <Response>response;
+            response = <ValidationErrorResult>(httpResponse.json());
+        }
+
+        // It's not yet clear whether this is a legitimate and supported use of the ng.ControlGroup API.
+        // Need feedback from the Angular 2 team on whether there's a better way. 
+        var errors = <ValidationErrorResult>response;
+        Object.keys(errors || {}).forEach(key => {
+            errors[key].forEach(errorMessage => {
+                // This in particular is rough
+                if (!controlGroup.controls[key].errors) {
+                    (<any>controlGroup.controls[key])._errors = {};
+                }
+                
+                controlGroup.controls[key].errors[errorMessage] = true;
+            });
+        });
+    }
+
+}
+
+export interface ValidationErrorResult {
+    [propertyName: string]: string[];
+}