DataGrid Input Validation Enhancement: Show Error Message.

[Arebusf21]

Is there a way to show the validation error message in a DataGrid control?
As of now, The Cell containing the error is bordered in Red, the row background turns red. I would like to show an error message below the cell that has been validated, similar to what I can currently do in WPF.
The user knows he has made an error but has no idea why!

I cannot find a sample to illustrate how to do this.

Here is a link to my validation demo app:
https://github.com/Arebusf21/DataGridValidationDemo