Sample and readme file updated

Author: Priyadharshini-Sf4862

README.md

@@ -48,9 +48,15 @@ It has been achieved by setting [Interior](https://help.syncfusion.com/cr/wpf/Sy
 
 ## Output:
 
-![gradient colors for each series WPF Chart](Output.png) 
+![gradient colors for each series WPF Chart](Output.png)
 
-KB article - [How to apply gradient colors for each series in WPF Chart](https://www.syncfusion.com/kb/11849/how-to-apply-gradient-colors-for-each-series-in-wpf-chart)
+## Troubleshooting
+
+#### Path too long exception
+
+If you are facing a path too long exception when building this example project, close Visual Studio and rename the repository to a shorter name before building the project.
+
+For more details, refer to the KB on [How to apply gradient colors for each series in WPF Chart](https://www.syncfusion.com/kb/11849/how-to-apply-gradient-colors-for-each-series-in-wpf-chart).
 
 ### See Also
 
@@ -60,4 +66,4 @@ KB article - [How to apply gradient colors for each series in WPF Chart](https:/
 
 [How to change colors of specific data points in the chart](https://www.syncfusion.com/kb/10928/how-to-change-colors-of-specific-data-points-in-the-chart)
 
-[How to add custom color model to series](https://www.syncfusion.com/kb/5480/how-to-add-custom-color-model-to-series)
+[How to add custom color model to series](https://www.syncfusion.com/kb/5480/how-to-add-custom-color-model-to-series)