How to create exe file with database including and softwares needed at client system

In addition to OriginalGriff

It’s not possible to attach a database inside your EXE file. Even if you add the database file in your application as a resource then it will be read only.
But one thing may solve your purpose.
1. Attach the database as resource in your application.
2. Copy it from the resource into local drive in first run of the application
3. Use the database from the local drive.

But I don’t know whether this will solve your purpose or not.

If you want to put Access Data Base inside your C# application, then you should do this.
First of all create any Access data base like here "PirFahimDataBase". Now in your Visual Studio go to the menu and do this

1: Click Data
2: Add New Data Base
3: Click Next
4: Click New Connection
5: Now change the Data Source by clicking Change and select Microsoft Access data base files
6: Click Browse for selecting your created data base

Now take inside in your project. You will have an access data base file in your project. After all that go to your .cs file and give a path to your data base connection string

System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection();
conn.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;" +
@"Data source=PirFahimDataBase.accdb";

Here, lets give an attention you have no extra path for your "Data Source" , because your Access Data Base file is in your project now. So just put the name of your Data Base File.