Want to allow width resizing however.
I am little confused about what you want to achieve. In the title of this forum thread you want to turn off and in the description you want to enable this. Anyway, this is controlled by the DataRecordSizingMode of the FieldLayoutSettings.
xamDataGrid1.FieldLayoutSettings.DataRecordSizingMode = DataRecordSizingMode.SizedToContentAndIndividuallySizable;
I want to turnoff the height resizing while leaving the user with the ability to resize the width of the cell. Row Height resizing gets really annoying when trying to do data entry because the resize icon pops up whenever you're trying to select cells because it believe you're attempting to change the row height..