Update README.md

Indumathi1195R · web-flow · commit 5f9557cd17bf · 2020-05-05T17:31:07.000+05:30
Sample and images added.
diff --git a/README.md b/README.md
@@ -80,3 +80,8 @@ class _ViewRestrictionState extends State<ViewRestriction> {
   }
 }
 ```
+**[View document in Syncfusion Flutter Knowledge base](https://www.syncfusion.com/kb/11329/how-to-restrict-date-range-picker-within-the-date-limit-in-flutter-date-range-picker)**
+
+**Screenshots**
+
+![selected date](http://www.syncfusion.com/uploads/user/kb/flut/flut-856/flut-856_img1.png)

Original file line number	Diff line number	Diff line change
`@@ -80,3 +80,8 @@ class _ViewRestrictionState extends State<ViewRestriction> {`
`80`	`80`	`}`
`81`	`81`	`}`
`82`	`82`	```
	`83`	`+[View document in Syncfusion Flutter Knowledge base](https://www.syncfusion.com/kb/11329/how-to-restrict-date-range-picker-within-the-date-limit-in-flutter-date-range-picker)`
	`84`	`+`
	`85`	`+Screenshots`
	`86`	`+`
	`87`	`+![selected date](http://www.syncfusion.com/uploads/user/kb/flut/flut-856/flut-856_img1.png)`