Thank you for writing.
uses the culture of the current UI thread to format values. You can change it and all values will be formatted according to the culture you set. As an alternative, you can use the ItemFormatting
event to format values. You can read more about formatting the property grid items in our online documentation - Item Formatting.
I hope that you find this information useful. Should you have further questions, I would be glad to help.
the Telerik team