How do you connect to the named instance of an SQL server?

To connect to a named instance of SQL Server, you need to specify the instance name in your connection string. The general format of the connection string for a named instance is as follows:

```
ServerName\InstanceName
```

Here's an example connection string using SQL Server authentication:

```sql
Server=myServerName\myInstanceName;Database=myDatabase;User Id=myUsername;Password=myPassword;
```

In this example:

- `myServerName` is the name of your SQL Server.
- `myInstanceName` is the name of the named instance you want to connect to.
- `myDatabase` is the name of the specific database you want to connect to.
- `myUsername` and `myPassword` are your SQL Server login credentials.

If you are using Windows Authentication, you can omit the `User Id` and `Password` parameters:

```sql
Server=myServerName\myInstanceName;Database=myDatabase;Integrated Security=True;
```

Make sure to replace the placeholder values with your actual server, instance, database, and authentication details.

If you are using a connection string in a programming language, such as C#, the connection string might be set in your application's configuration file or specified directly in code. Here's an example in C#:

```csharp
string connectionString = "Server=myServerName\\myInstanceName;Database=myDatabase;User Id=myUsername;Password=myPassword;";
using (SqlConnection connection = new SqlConnection(connectionString))
{
    // Your code to interact with the database using the connection
    connection.Open();
    // Perform database operations here
}
```

Again, adjust the connection string based on your specific configuration and requirements.