VAVanaja Annasamy Syncfusion Team July 27, 2017 03:58 PM UTC
Thank you for contacting Syncfusion support.
We were unable to reproduce the reported issue "FormatString is not changing dynamically when binding" in SfNumericUpDown. We have provided the sample for your reference. Please download the same from below link.
Please run the sample and check whether issue reproduces at your end. If not please modify the changes in the given sample and revert the error reproducing sample and this will help us replicate the issue at our end.