diff --git a/CrossPlatformModules.csproj b/CrossPlatformModules.csproj
index 1e8e0aeef..a44d0d1e4 100644
--- a/CrossPlatformModules.csproj
+++ b/CrossPlatformModules.csproj
@@ -211,7 +211,7 @@
     <TypeScriptCompile Include="apps\ui-tests-app\bindings\xmlbasics.ts">
       <DependentUpon>xmlbasics.xml</DependentUpon>
     </TypeScriptCompile>
-	<TypeScriptCompile Include="apps\ui-tests-app\bindings\basics.ts" />
+    <TypeScriptCompile Include="apps\ui-tests-app\bindings\basics.ts" />
     <TypeScriptCompile Include="apps\ui-tests-app\layouts\absolute.ts" />
     <TypeScriptCompile Include="apps\ui-tests-app\layouts\dock.ts" />
     <TypeScriptCompile Include="apps\ui-tests-app\layouts\grid.ts" />
@@ -706,6 +706,8 @@
     <Content Include="apps\tests\xml-declaration\mymodulewithxml\my-control-no-js.xml">
       <SubType>Designer</SubType>
     </Content>
+    <Content Include="apps\tests\xml-declaration\mymodulewithxml\MyControl.css" />
+    <Content Include="apps\tests\xml-declaration\mymodule\MyControl.css" />
     <Content Include="apps\ui-tests-app\bindings\xmlbasics.xml" />
     <Content Include="apps\ui-tests-app\layouts\absolute.xml" />
     <Content Include="apps\ui-tests-app\layouts\dock.xml" />
diff --git a/apps/tests/ui/style/style-tests.ts b/apps/tests/ui/style/style-tests.ts
index 66a35a762..9bc6ba6a9 100644
--- a/apps/tests/ui/style/style-tests.ts
+++ b/apps/tests/ui/style/style-tests.ts
@@ -778,6 +778,17 @@ export var test_CSS_isAppliedOnPage_From_Import = function () {
     });
 }
 
+export var test_CSS_isAppliedOnPage_From_addCssFile = function () {
+    var testButton = new buttonModule.Button();
+    testButton.text = "Test";
+
+    helper.buildUIAndRunTest(testButton, function (views: Array<viewModule.View>) {
+        var page: pageModule.Page = <pageModule.Page> views[1];
+        page.addCssFile("~/ui/style/test.css");
+        helper.assertViewBackgroundColor(page, "#FF0000");
+    });
+}
+
 // <snippet module="ui/styling" title="styling">
 // For information and example how to use style properties please refer to special [**Styling**](../../../styling.md) topic. 
 // </snippet>
diff --git a/apps/tests/xml-declaration/mymodule/MyControl.css b/apps/tests/xml-declaration/mymodule/MyControl.css
new file mode 100644
index 000000000..d701672c7
--- /dev/null
+++ b/apps/tests/xml-declaration/mymodule/MyControl.css
@@ -0,0 +1,3 @@
+.MyStackLayout {
+    background-color: red;
+}
diff --git a/apps/tests/xml-declaration/mymodule/MyControl.ts b/apps/tests/xml-declaration/mymodule/MyControl.ts
index 53ba3b697..aca0396d3 100644
--- a/apps/tests/xml-declaration/mymodule/MyControl.ts
+++ b/apps/tests/xml-declaration/mymodule/MyControl.ts
@@ -18,5 +18,7 @@ export class MyControl extends stackLayoutModule.StackLayout {
 
         this.addChild(lbl);
         this.addChild(btn);
+
+        this.cssClass = "MyStackLayout";
     }
 }
\ No newline at end of file
diff --git a/apps/tests/xml-declaration/mymodulewithxml/MyControl.css b/apps/tests/xml-declaration/mymodulewithxml/MyControl.css
new file mode 100644
index 000000000..dd3ccf653
--- /dev/null
+++ b/apps/tests/xml-declaration/mymodulewithxml/MyControl.css
@@ -0,0 +1,3 @@
+.MySecondCustomStackLayout {
+    background-color: green;
+}
diff --git a/apps/tests/xml-declaration/mymodulewithxml/MyControl.xml b/apps/tests/xml-declaration/mymodulewithxml/MyControl.xml
index 016a2736c..4fe8e30f7 100644
--- a/apps/tests/xml-declaration/mymodulewithxml/MyControl.xml
+++ b/apps/tests/xml-declaration/mymodulewithxml/MyControl.xml
@@ -1,4 +1,4 @@
-<StackLayout xmlns:customControls="xml-declaration/mymodule">
+<StackLayout xmlns:customControls="xml-declaration/mymodule" cssClass="MySecondCustomStackLayout">
   <Label id="Label1" text="mymodulewithxml" />
   <Button text="Click!" tap="buttonTap2" /> 
 </StackLayout>
diff --git a/apps/tests/xml-declaration/xml-declaration-tests.ts b/apps/tests/xml-declaration/xml-declaration-tests.ts
index 5fbc4de33..8d9f20354 100644
--- a/apps/tests/xml-declaration/xml-declaration-tests.ts
+++ b/apps/tests/xml-declaration/xml-declaration-tests.ts
@@ -50,6 +50,31 @@ export function test_loadWithOptionsNoXML() {
     TKUnit.assert(v instanceof view.View, "Expected result: View; Actual result: " + v + ";");
 };
 
+export function test_loadWithOptionsNoXML_CSSIsApplied() {
+    var newPage: page.Page;
+    var pageFactory = function (): page.Page {
+        newPage = new page.Page();
+
+        newPage.content = builder.load({
+            path: "~/xml-declaration/mymodule",
+            name: "MyControl",
+            exports: exports,
+            page: newPage
+        });
+
+        return newPage;
+    };
+
+    helper.navigate(pageFactory);
+    TKUnit.assert(newPage.isLoaded, "The page should be loaded here.");
+    try {
+        helper.assertViewBackgroundColor(newPage.content, "#FF0000");
+    }
+    finally {
+        helper.goBack();
+    }
+};
+
 export function test_loadWithOptionsWithXML() {
     var v = builder.load({
         path: "~/xml-declaration/mymodulewithxml",
@@ -59,6 +84,31 @@ export function test_loadWithOptionsWithXML() {
     TKUnit.assert(v instanceof view.View, "Expected result: View; Actual result: " + v + ";");
 };
 
+export function test_loadWithOptionsWithXML_CSSIsApplied() {
+    var newPage: page.Page;
+    var pageFactory = function (): page.Page {
+        newPage = new page.Page();
+
+        newPage.content = builder.load({
+            path: "~/xml-declaration/mymodulewithxml",
+            name: "MyControl",
+            exports: exports,
+            page: newPage
+        });
+
+        return newPage;
+    };
+
+    helper.navigate(pageFactory);
+    TKUnit.assert(newPage.isLoaded, "The page should be loaded here.");
+    try {
+        helper.assertViewBackgroundColor(newPage.content, "#008000");
+    }
+    finally {
+        helper.goBack();
+    }
+};
+
 export function test_loadWithOptionsFromTNS() {
     var v = builder.load({
         path: "ui/label",
diff --git a/ui/builder/builder.d.ts b/ui/builder/builder.d.ts
index 9834658f5..9328be659 100644
--- a/ui/builder/builder.d.ts
+++ b/ui/builder/builder.d.ts
@@ -1,6 +1,7 @@
 //@private
 declare module "ui/builder" {
     import view = require("ui/core/view");
+    import page = require("ui/page");
 
     export function load(fileName: string, exports?: any): view.View;
     export function load(options: LoadOptions): view.View;
@@ -10,5 +11,6 @@ declare module "ui/builder" {
         path: string;
         name: string;
         exports?: any;
+        page?: page.Page;
     }
 }
diff --git a/ui/builder/builder.ts b/ui/builder/builder.ts
index 1942552e7..4d2f05bef 100644
--- a/ui/builder/builder.ts
+++ b/ui/builder/builder.ts
@@ -7,6 +7,9 @@ import componentBuilder = require("ui/builder/component-builder");
 import templateBuilderDef = require("ui/builder/template-builder");
 import platform = require("platform");
 import definition = require("ui/builder");
+import page = require("ui/page");
+import fileResolverModule = require("file-system/file-name-resolver");
+import trace = require("trace");
 
 var KNOWNCOLLECTIONS = "knownCollections";
 
@@ -36,6 +39,7 @@ export function parse(value: string, context: any): view.View {
 }
 
 function parseInternal(value: string, context: any): componentBuilder.ComponentModule {
+    var currentPage: page.Page;
     var rootComponentModule: componentBuilder.ComponentModule;
     // Temporary collection used for parent scope.
     var parents = new Array<componentBuilder.ComponentModule>();
@@ -115,7 +119,7 @@ function parseInternal(value: string, context: any): componentBuilder.ComponentM
 
                 if (args.prefix && args.namespace) {
                     // Custom components
-                    componentModule = loadCustomComponent(args.namespace, args.elementName, args.attributes, context);
+                    componentModule = loadCustomComponent(args.namespace, args.elementName, args.attributes, context, currentPage);
                 } else {
                     // Default components
                     componentModule = componentBuilder.getComponentModule(args.elementName, args.namespace, args.attributes, context);
@@ -138,6 +142,10 @@ function parseInternal(value: string, context: any): componentBuilder.ComponentM
                     } else if (parents.length === 0) {
                         // Set root component.
                         rootComponentModule = componentModule;
+
+                        if (rootComponentModule && rootComponentModule.component instanceof page.Page) {
+                            currentPage = <page.Page>rootComponentModule.component;
+                        }
                     }
 
                     // Add the component instance to the parents scope collection.
@@ -175,26 +183,29 @@ function parseInternal(value: string, context: any): componentBuilder.ComponentM
     return rootComponentModule;
 }
 
-function loadCustomComponent(componentPath: string, componentName?: string, attributes?: Object, context?: Object): componentBuilder.ComponentModule {
+function loadCustomComponent(componentPath: string, componentName?: string, attributes?: Object, context?: Object, parentPage?: page.Page): componentBuilder.ComponentModule {
     var result: componentBuilder.ComponentModule;
     componentPath = componentPath.replace("~/", "");
 
-    var fileName = componentPath;
+    var fullComponentPathFilePathWithoutExt = componentPath;
 
-    if (!fs.File.exists(fileName)) {
-        fileName = fs.path.join(fs.knownFolders.currentApp().path, componentPath, componentName) + ".xml";
+    if (!fs.File.exists(componentPath)) {
+        fullComponentPathFilePathWithoutExt = fs.path.join(fs.knownFolders.currentApp().path, componentPath, componentName);
     }
 
-    if (fs.File.exists(fileName)) {
+    var xmlFilePath = resolveFilePath(fullComponentPathFilePathWithoutExt, "xml");
+
+    if (xmlFilePath) {
         // Custom components with XML
-        var jsPath = fileName.replace(".xml", ".js");
+        var jsFilePath = resolveFilePath(fullComponentPathFilePathWithoutExt, "js");
+
         var subExports;
-        if (fs.File.exists(jsPath)) {
+        if (jsFilePath) {
             // Custom components with XML and code
-            subExports = require(jsPath.replace(".js", ""))
+            subExports = require(jsFilePath)
         }
 
-        result = loadInternal(fileName, subExports);
+        result = loadInternal(xmlFilePath, subExports);
 
         // Attributes will be transfered to the custom component
         if (types.isDefined(result) && types.isDefined(result.component) && types.isDefined(attributes)) {
@@ -208,22 +219,47 @@ function loadCustomComponent(componentPath: string, componentName?: string, attr
         result = componentBuilder.getComponentModule(componentName, componentPath, attributes, context);
     }
 
+    // Add component CSS file if exists.
+    var cssFilePath = resolveFilePath(fullComponentPathFilePathWithoutExt, "css");
+    if (cssFilePath) {
+        if (parentPage) {
+            parentPage.addCssFile(cssFilePath);
+        } else {
+            trace.write("CSS file found but no page specified. Please specify page in the options!", trace.categories.Error, trace.messageType.error);
+        }
+    }
+
     return result;
 }
 
-export function load(arg: any): view.View {
+var fileNameResolver: fileResolverModule.FileNameResolver;
+function resolveFilePath(path, ext): string {
+    if (!fileNameResolver) {
+        fileNameResolver = new fileResolverModule.FileNameResolver({
+            width: platform.screen.mainScreen.widthDIPs,
+            height: platform.screen.mainScreen.heightDIPs,
+            os: platform.device.os,
+            deviceType: platform.device.deviceType
+        });
+    }
+    return fileNameResolver.resolveFileName(path, ext);
+}
+
+export function load(pathOrOptions: string | definition.LoadOptions, context?: any): view.View {
     var viewToReturn: view.View;
     var componentModule: componentBuilder.ComponentModule;
 
-    if (arguments.length === 1) {
-        if (!types.isString(arguments[0])) {
-            var options = <definition.LoadOptions>arguments[0];
-            componentModule = loadCustomComponent(options.path, options.name, undefined, options.exports);
+    if (!context) {
+        if (!types.isString(pathOrOptions)) {
+            let options = <definition.LoadOptions>pathOrOptions;
+            componentModule = loadCustomComponent(options.path, options.name, undefined, options.exports, options.page);
         } else {
-            componentModule = loadInternal(<string>arguments[0]);
+            let path = <string>pathOrOptions;
+            componentModule = loadInternal(path);
         }
     } else {
-        componentModule = loadInternal(<string>arguments[0], arguments[1]);
+        let path = <string>pathOrOptions;
+        componentModule = loadInternal(path, context);
     }
 
     if (componentModule) {
@@ -303,4 +339,4 @@ function getExports(instance: view.View): any {
     }
 
     return parent ? (<any>parent).exports : undefined;
-}
\ No newline at end of file
+}
diff --git a/ui/page/page-common.ts b/ui/page/page-common.ts
index e056dc8a4..486ff033e 100644
--- a/ui/page/page-common.ts
+++ b/ui/page/page-common.ts
@@ -20,7 +20,6 @@ var navigationBarHiddenProperty = new dependencyObservable.Property(
     );
 
 function onNavigationBarHiddenPropertyChanged(data: dependencyObservable.PropertyChangeData) {
-    console.log("onNavigationBarHiddenPropertyChanged("+data.newValue+")");
     var page = <Page>data.object;
     if (page.isLoaded) {
         page._updateNavigationBar(data.newValue);
@@ -116,15 +115,18 @@ export class Page extends contentView.ContentView implements dts.Page, view.AddA
         this._refreshCss();
     }
 
+    private _cssFiles = {};
     public addCssFile(cssFileName: string) {
-        if (cssFileName.indexOf(fs.knownFolders.currentApp().path) !== 0) {
-            cssFileName = fs.path.join(fs.knownFolders.currentApp().path, cssFileName);
+        if (cssFileName.indexOf("~/") === 0) {
+            cssFileName = fs.path.join(fs.knownFolders.currentApp().path, cssFileName.replace("~/", ""));
         }
-
-        var cssString;
-        if (fs.File.exists(cssFileName)) {
-            new fileSystemAccess.FileSystemAccess().readText(cssFileName, r => { cssString = r; });
-            this._addCssInternal(cssString, cssFileName);
+        if (!this._cssFiles[cssFileName]) {
+            if (fs.File.exists(cssFileName)) {
+                new fileSystemAccess.FileSystemAccess().readText(cssFileName, r => {
+                    this._addCssInternal(r, cssFileName);
+                    this._cssFiles[cssFileName] = true;
+                });
+            }
         }
     }
 
diff --git a/ui/styling/style-scope.ts b/ui/styling/style-scope.ts
index 05c69cb96..3015b6d45 100644
--- a/ui/styling/style-scope.ts
+++ b/ui/styling/style-scope.ts
@@ -33,18 +33,17 @@ export class StyleScope {
     }
 
     public addCss(cssString: string, cssFileName: string): void {
-        if (this._css === undefined) {
-            this._css = cssString;
-        }
-        else {
-            this._css += cssString;
-        }
-        this._cssFileName = cssFileName;
+        this._css = this._css ? this._css + cssString : cssString;
+        this._cssFileName = cssFileName
+
         this._reset();
-        if (this._cssSelectors) {
-            var addedSelectors = StyleScope.createSelectorsFromCss(cssString, cssFileName);
-            this._cssSelectors = StyleScope._joinCssSelectorsArrays([this._cssSelectors, addedSelectors]);
+
+        if (!this._cssSelectors) {
+            this._cssSelectors = new Array<cssSelector.CssSelector>();
         }
+
+        var selectorsFromFile = StyleScope.createSelectorsFromCss(cssString, cssFileName);
+        this._cssSelectors = StyleScope._joinCssSelectorsArrays([this._cssSelectors, selectorsFromFile]);
     }
 
     public static createSelectorsFromCss(css: string, cssFileName: string): cssSelector.CssSelector[] {