how to store data in office addin

See more:

C#

See more: C#
Hi all,
Iam creating an addin for microsoft project plan using visual studio.There i need to store some small amount of data which user enters through UI.users will be openting the application from server and enter data .I need to make this data entered by the user should be avaliable to all.can any one give me any suggestions for this. .is there any way to store the data in excel or xml or text file and store it in a centralised location while deolying the exe.so that every one can updateand updated data is availiable for all?