sql server ce - SQL Compact 4 Entity Framowrk 3.5 upgrade .sdf file -

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i have windows forms application. deploy on client's machine. use application localy on machine. need upgrade database. how without loosing client's data?

i use sql server compact edition 4.0 , entity framework 3.5.

create script required alter , insert/update/delete statements, , execute statements 1 one against customer database (and maybe indicate in table database has been uppgraded in order run process once)


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