Flow of actions

Here is what I did…

	Enable ContentType-Management
	List-Overview with enabled ContentType-Management. The ContentType “Task” is attached to the list.
	Field overview of the ContentType inside the “Task-List”. The field Status is named “Status”.
	Properties of the Field of the ContentType “Task” inside the list. The StaticName of the field is “Status” as one can see inside the red ellipse.
	The fields available when navigating to the properties of the ContentType “Task” inside the “Site Content Type Gallery” of the site collection. Note: One can already see that the “Status-Column” is named “Task Status” here.
	If you navigate deeper into the field properties of the base ContentType “Task” you see (inside the red ellipse) that here the StaticName is “TaskStatus”.

Bug

This is definitely a bug. These StaticName properties of the fields should be the same! What is even more weird is the fact that the Id’s of the fields are identical! Both have a guid of “c15b34c3-ce7d-490a-b133-3f4de8801b76″!

If you look inside the schema.xml of the default task list (found in 12/Template/Features/TaskList/Tasks/schema.xml) you see that the StaticName is set to “Status”. If you take a look inside the ContentType-definitions of the sharepoint-core (found in 12/Templates/Features/ctypes/ctypeswss.xml) you will notice that the name of the field with the id “c15b34c3-ce7d-490a-b133-3f4de8801b76″ is set to “Status”, too.

So I cannot explain why the fields in the ContentType “Task” are prefixed with “Task”. The field DueDate is also affected. Inside lists its StaticName is “DueDate” inside the ContentType its named “TaskDueDate”.

Conclusion

It seems that you can’t even rely on the StaticName! Instead always make use of the Id of a field!

The trick

So there is no such property available in the SPList-class which allows us to disable the DocumentTemplateUrl. In order to “get the property” we need to cast the object.

// web was declared earlier
SPDocumentLibrary docLib = (SPDocumentLibrary) web.GetList(SPUrlUtility.CombineUrl(web.ServerRelativeUrl, "Lists/doclib"));
docLib.DocumentTemplateUrl = string.Empty;
docLib.Update();

Thats it.