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C#

I have a Windows application in C# that completely runs offline. I have used SQL Server as backend and use .mdf, .ldf files in my application for database access.

While creating setup file we have added these files in setup file.here i have created setup file using vs installer. and also install sql express in client pc.

Now the problem is when we install setup file in client computer it creates a folder in

C:/'Default Company Name'
but every time we have to give permissions to these files through windows security option. Is there any way we can assign permissions once for all?

What I have tried:

i am using below connection string from app.config folder to connect with database

<connectionStrings>
   
    <add name="conString" connectionString="Data Source=(LocalDB)\v11.0; AttachDbFilename=C:\Program Files\MYsetup\MYdatabase.mdf;Integrated Security=True;Connect Timeout=30"/>
  </connectionStrings>