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+# DevExtreme TypeScript definitions #
+
+You can use DevExtreme TypeScript definitions to add DevExtreme widgets ([UI widgets](http://js.devexpress.com/Documentation/ApiReference/UI_Widgets) and [Data Visualization widgets](http://js.devexpress.com/Documentation/ApiReference/Data_Visualization_Widgets)) to your TypeScript apps, as well as build [DevExtreme single-page applications](http://js.devexpress.com/Documentation/Howto/SPA_Framework/Application_Design) using TypeScript. To do that, simply add <reference path="TypeScript/dx.devextreme.d.ts" /> at the top of your code.
+
+The API enclosed into the DevExtreme TypeScript definition file fully corresponds to the API described in the DevExtreme JavaScript [Reference](http://js.devexpress.com/Documentation/ApiReference) documentation.
+
+To build applications based on the DevExtreme SPA framework in Visual Studio, use TypeScript [application templates](http://js.devexpress.com/Documentation/Howto/VS_Integration/Project_Templates) integrated into Visual Studio.
+
+If you have any issues while using the DevExtreme TypeScript definitions, please refer to our [Support Center](https://www.devexpress.com/Support/Center/Question/List/1).