.NET SQLite Connection Strings

using Devart.Data.SQLite;
...
SQLiteConnection conn = new SQLiteConnection();
conn.ConnectionString = @"DataSource=database.db;FailIfMissing=False;";

using Devart.Data.SQLite;
...
SQLiteConnectionStringBuilder conn = new SQLiteConnectionStringBuilder();
conn.DataSource = @"database.db";
conn.FailIfMissing = false;
conn.Locking = LockingMode.Exclusive;
conn.AutoVacuum = AutoVacuumMode.Full;
conn.ConnectionTimeout = 20;
SQLiteConnection sqLiteConnection = new SQLiteConnection(conn.ConnectionString);

using System;
using Devart.Data.SQLite;

namespace SQLiteAES256Example
{
   class Program
   {
    	static void Main(string[] args)
    	{
        	// Open/create an unencrypted database
        	SQLiteConnection conn = new SQLiteConnection("DataSource=sakila.db;Encryption=AES256;FailIfMissing=false;");
        	conn.Open();
        	conn.ChangePassword("best"); // Encrypt the database with the password "best"
        	conn.Close();

        	// Open the encrypted database with AES256 encryption
        	conn = new SQLiteConnection("DataSource=sakila.db;Encryption=AES256;Password=best; FailIfMissing=false;");
        	conn.Open();
        	Console.WriteLine("Encrypted database opened successfully.");
        	conn.Close();
    	}
   }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Devart.Data.SQLite;

namespace SQLiteCryptSample
{
    class Program
    {
        static void Main(string[] args)
        {
            // Open/create an unencrypted database
            SQLiteConnection conn = new SQLiteConnection("DataSource=database.db;Encryption=SQLiteCrypt;EncryptionLicenseKey=00000-000-0000000-00000;FailIfMissing=false;");
            conn.Open();
            conn.ChangePassword("best"); // Encrypt the database with the password "best"
            conn.Close();

            // Open the already encrypted database
            conn = new SQLiteConnection("DataSource=database.db;Encryption=SQLiteCrypt;EncryptionLicenseKey=00000-000-0000000-00000;FailIfMissing = false;password=best");
            conn.Open();
            conn.ChangePassword("best2"); // Change password to "best2"
            conn.Close();

            // Open the database with the new password
            conn = new SQLiteConnection("DataSource=database.db;Encryption=SQLiteCrypt;EncryptionLicenseKey=00000-000-0000000-00000;FailIfMissing=false;password=best2");
            conn.Open();
            conn.ChangePassword(""); // Assign an empty password - decrypt the database
            conn.Close();

            // Open the unencrypted database
            conn = new SQLiteConnection("DataSource=database.db;FailIfMissing = false;");
            conn.Open();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Devart.Data.SQLite;

namespace SQLCipherSample
{
	class Program
	{
    	static void Main(string[] args)
    	{
        	// Creating a new database without encryption
        	SQLiteConnection conn = new SQLiteConnection("DataSource=dbUnencrypted.db;FailIfMissing=false;Pooling=false");
        	conn.Open();

        	// Add a table to the database, because it must not be empty if we want to encrypt it with SQLCipher
        	SQLiteCommand cmd = new SQLiteCommand(@"CREATE TABLE DEPT (
                                                    	DEPTNO INTEGER PRIMARY KEY,
                                                    	DNAME VARCHAR(14),
                                                    	LOC VARCHAR(13)
                                                	);", conn);
        	cmd.ExecuteNonQuery();
        	cmd.CommandText = "INSERT INTO DEPT VALUES (10,'ACCOUNTING','NEW YORK');";
        	cmd.ExecuteNonQuery();
        	conn.Close();

        	// Use the SQLCipherExport method to create a new database dbEncrypted.db with SQLCipher encryption
        	// and copy data from the unencrypted database dbUnencrypted.db
        	conn = new SQLiteConnection("DataSource=dbUnencrypted.db;Encryption=SQLCipher;FailIfMissing=false;Pooling=false;EncryptionLicenseKey=OmNjXDZDiz....ljNw");
        	conn.Open();
        	conn.SQLCipherExport("dbEncrypted.db", "password");
        	conn.Close();

        	// Open the encrypted with SQLCipher dbEncrypted.db database
        	conn = new SQLiteConnection("DataSource=dbEncrypted.db;Encryption=SQLCipher;FailIfMissing=false;Password=password;Pooling=false;EncryptionLicenseKey=OmNjXDZDiz....ljNw");
        	conn.Open();
        	cmd.CommandText = "select dname from dept where deptno=10";
        	cmd.Connection = conn;
        	Console.WriteLine(cmd.ExecuteScalar());
        	Console.WriteLine("The encrypted database is successfully opened");
        	conn.ChangePassword("newPass"); //Use the ChangePassword method to change the password for the dbEncrypted.db database
        	conn.Close();

        	// Open the encrypted with SQLCipher dbEncrypted.db database with the new password
        	conn = new SQLiteConnection("DataSource=dbEncrypted.db;Encryption=SQLCipher;FailIfMissing=false;Password=newPass;Pooling=false;EncryptionLicenseKey=OmNjXDZDiz....ljNw");
        	conn.Open();
        	cmd.CommandText = "select dname from dept where deptno=10";
        	cmd.Connection = conn;
        	Console.WriteLine(cmd.ExecuteScalar());
        	Console.WriteLine("The database with the new password is successfully opened");
        	conn.Close();

        	// decrypt the database
        	// Use the SQLCipherExport method to create a new database dbUnencrypted1.db without SQLCipher encryption and copy
        	// data from the encrypted database dbEncrypted.db
        	conn = new SQLiteConnection("DataSource=dbEncrypted.db;Encryption=SQLCipher;FailIfMissing=false;Password=newPass;Pooling=false;EncryptionLicenseKey=OmNjXDZDiz....ljNw");
        	conn.Open();
        	conn.SQLCipherExport("dbUnencrypted1.db", "");
        	conn.Close();

        	// Open the decrypted database
        	conn = new SQLiteConnection("DataSource=dbUnencrypted1.db;FailIfMissing=false;Pooling=false");
        	conn.Open();
        	cmd.CommandText = "select dname from dept where deptno=10";
        	cmd.Connection = conn;
        	Console.WriteLine(cmd.ExecuteScalar());
        	Console.WriteLine("The decrypted database is successfully opened");
        	conn.Close();
    	}
	}
}