README auto update [skip ci]

Author: DevExpressExampleBot

README.md

@@ -2,6 +2,7 @@
 ![](https://img.shields.io/endpoint?url=https://codecentral.devexpress.com/api/v1/VersionRange/247696676/21.1.2%2B)
 [![](https://img.shields.io/badge/Open_in_DevExpress_Support_Center-FF7200?style=flat-square&logo=DevExpress&logoColor=white)](https://supportcenter.devexpress.com/ticket/details/T871581)
 [![](https://img.shields.io/badge/📖_How_to_use_DevExpress_Examples-e9f6fc?style=flat-square)](https://docs.devexpress.com/GeneralInformation/403183)
+[![](https://img.shields.io/badge/💬_Leave_Feedback-feecdd?style=flat-square)](#does-this-example-address-your-development-requirementsobjectives)
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@@ -15,3 +16,10 @@ The **PDF Document API** allows you to apply multiple PKCS#7 signatures with X.5
 This sample project shows how to apply a signature to an existing and new signature field.
 
 Refer to the [Sign Documents](https://docs.devexpress.com/OfficeFileAPI/114623/pdf-document-api/document-security/sign-documents?v=20.1) documentation article for more information.
+<!-- feedback -->
+## Does this example address your development requirements/objectives?
+
+[<img src="https://www.devexpress.com/support/examples/i/yes-button.svg"/>](https://www.devexpress.com/support/examples/survey.xml?utm_source=github&utm_campaign=pdf-document-api-multiple-signatures&~~~was_helpful=yes) [<img src="https://www.devexpress.com/support/examples/i/no-button.svg"/>](https://www.devexpress.com/support/examples/survey.xml?utm_source=github&utm_campaign=pdf-document-api-multiple-signatures&~~~was_helpful=no)
+
+(you will be redirected to DevExpress.com to submit your response)
+<!-- feedback end -->