diff --git a/README.md b/README.md
index f1f11df..bbafa27 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,12 @@ In order to use for asp.net mvc, you need to install more a helper package. This
 
 ``` Install-Package GoogleRecaptchaMvc ```
 
+In order to use for asp.net web forms, you need to install more a package. This package is used to create the server control for Google Recaptcha:
+
+``` Install-Package GoogleRecaptchaWebForms ```
+
 ### Samples
+#### ASP.NET MVC
 We will have a minor sample for asp.net mvc. In this sample, we have a view called __Index.cshtml__ and a controller named __HomeController__. In __index__ view, we will render the html control with the Google reCaptcha version 2 format. Also, HomeController will have 2 actions inside it. The first action is to implement the GET request. The second action is to implement the POST request used to verify the Google Recaptcha. The following is the sample code:
 
 __Index.cshtml__:
@@ -57,6 +62,37 @@ public class HomeController: Controller
 }
 ```
 
+#### ASP.NET Web Forms
+For asp.net web forms, after you have installed the library, you have two ways to use it:
+* Refer to it in web.config:
+```xml
+...
+    <system.web>
+    
+        <pages>
+          <controls>
+            <add tagPrefix="asp" assembly="GoogleRecaptchaWebForms"/>
+          </controls>
+        </pages>
+
+  </system.web>
+...
+```
+* Refer to it in each pages aspx or user controls ascx:
+```xml
+<%@ Register TagPrefix="asp" Namespace="GoogleRecaptchaWebForms" Assembly="GoogleRecaptchaWebForms" %>
+```
+
+Next you can use server control of Google Recaptcha for any page or user control:
+```xml
+...
+    <asp:RecaptchaV2Control ID="gRecaptcha" SiteKey="[YOUR_SITE_KEY]"
+        SecretKey="[YOUR_SECRET_KEY]" runat="server"/>
+...
+```
+
+Finally on the server-side, you can verify the captcha by using __Page.IsValid__ or __gRecaptcha.IsValid__. The success is __true__, otherwise is __false__
+
 ### Bugs and Issues
 If any issue or bug, please push a new issue [here](https://github.com/congdongdotnet/GoogleRecaptcha/issues).
 
@@ -65,6 +101,7 @@ If any issue or bug, please push a new issue [here](https://github.com/congdongd
 * 1.0.1: Add the meaningful comments into code and fix some following performance bugs:
     * Dispose and close the unnecessary resources when using MemoryStream.
     * Use the HtmlHelper class in the namespace System.Web.Mvc instead of System.Web.WebPages.Html.
+* 1.1.1: Support the Google Recaptcha version 2 for asp.net web forms.
 
 ### Copyright and License
 Copyright 2015 by CongDongDotNet - MIT License