C# driver quickstart

This driver supports the vector and non-vector data types. However, DataStax recommends the Data API and clients for Serverless (Vector) databases.

DataStax recommends CQL drivers only for Serverless (Non-Vector) databases, existing applications that previously used a CQL-based driver, or if you plan to exclusively use CQL.

To determine the option that best suits your use case, see Compare connection methods.

This quickstart explains how to install the driver, connect it to your database, and, if necessary, migrate an existing DataStax C# driver to a version that can connect to your Serverless (Non-Vector) database.

Prerequisites

An active Astra account
An active Serverless (Non-Vector) database
A Secure Connect Bundle (SCB)
An application token
The latest .NET SDK downloaded and installed

Connect the C# driver to your database

Create a new C# project and configure it to connect to your Cassandra database:
```
mkdir csharpproject
cd csharpproject
dotnet new console
```
Add the C# driver dependencies to your project. The latest version is .
```
dotnet add package CassandraCSharpDriver -v <version>
```

Replace the code in Program.cs with the following code to connect to your Serverless (Non-Vector) database.

In the WithCloudSecureConnectionBundle method call, include the absolute path to your Serverless (Non-Vector) database’s SCB file (secure-connect-DATABASE_NAME.zip). In the WithCredentials method call, include your credentials.

using System;
using System.Linq;
using Cassandra;

namespace csharpproject
{
    class Program
    {
        static void Main(string[] args)
        {
            var session =
                Cluster.Builder()
                       .WithCloudSecureConnectionBundle(@"/SECURE_CONNECT_BUNDLE_PATH/secure-connect-DATABASE_NAME.zip")
                       .WithCredentials("clientId", "clientSecret")
                       .Build()
                       .Connect();
        }
    }
}

After the connection code, add the following code to the Main method in Program.cs. This code runs a CQL query and prints the output to the console.
```
var rowSet = session.Execute("select * from system.local");
Console.WriteLine(rowSet.First().GetValue<string>("cluster_name"));
```

Run your C# project with the dotnet runtime:

dotnet restore
dotnet build
dotnet run --no-build

Migrate the C# driver

If necessary, you can migrate an earlier DataStax C# driver to a version that can connect to your Serverless (Non-Vector) database.

Complete the prerequisites.
Add the C# driver dependencies to your project. The latest version is .
```
dotnet add package CassandraCSharpDriver -v <version>
```
In your existing DataStax C# driver code, modify the connection code to use the SCB.

In the WithCloudSecureConnectionBundle method call, include the path to the SCB for your Astra DB database (secure-connect-DATABASE_NAME.zip). In the WithCredentials method call, include your credentials.
```
var session =
  Cluster.Builder()
      .WithCloudSecureConnectionBundle(@"/SECURE_CONNECT_BUNDLE_PATH/secure-connect-DATABASE_NAME.zip")
        .WithCredentials("clientId", "clientSecret")
        .Build()
        .Connect();
```
Run your application.

C# driver quickstart

Prerequisites

Connect the C# driver to your database

Migrate the C# driver

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