public void Have_DataTypeAttribute()
{
// Arrange
string propertyName = "CreatedOn";
PhotoViewModel photoViewModel = new PhotoViewModel();
// Act
bool hasAttribute = photoViewModel.GetType()
.GetProperty(propertyName)
.GetCustomAttributes(false)
.Where(p => p.GetType() == typeof(DataTypeAttribute))
.Any();
// Assert
Assert.IsTrue(hasAttribute);
}