The RowHeight property is applied to each DataGridRow that does not have its Height property set. If a conflict exists between the RowHeight property and the MinRowHeight property, MinRowHeight takes precedence.
Setting RowHeight tells the layout system the amount of space requested by each row. The return value of this property is always the value that it was set to. To get the actual amount of space allocated, use the ActualHeight property of the DataGridRow. For more information about space allocation, see Layout.