Hi All,

I am using Umbraco version 8.17.0

I am trying to add a custom property to a member type using the following code:

IMemberType memberType = _memberTypeService.Get("Member");
IDataType textType = _dataTypeService.GetAll().Where(x => x.Name == "Textstring").FirstOrDefault();

PropertyType propType = new PropertyType(textType, "myTestProperty");
propType.Name = "My Test Property";

memberType.AddPropertyType(propType);
_memberTypeService.Save(memberType);

All works well and the property gets added to the 'Generic properties' group.

But, If I then delete it from the back office, then click 'Save' I get the error:

Validation: The Alias field is required.

Any ideas what I'm doing wrong?

Thanks in advance.

Mark

Update: If I delete it programmatically, it is removed from the backoffice!

memberType.RemovePropertyType("myTestProperty");
_memberTypeService.Save(memberType);