Numeric Range Validation Issue

Hi Tirumala Manikanta,

Basically every time you enter a number the Value property of the MaskedNumericInput will be updated. You can try setting the UpdateValueEvent property to "LostFocus".
This way the Value will be updated after you lose focus from the RadMaskedNumericInput control. If you enter a wrong value (exceeding the minimum and maximum)  the control will rollback to the last valid one.

You can check also our Throwing Validation Exceptions and Using DataAnnotation Attributes articles.
They can show you other ways of limiting your user input double number. 

If you have any other questions regarding Telerik controls, please don't hesitate to contact us.

Regards,
Dinko
Telerik