> For the complete documentation index, see [llms.txt](https://docs.autonomi.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.autonomi.com/developers/sdk/install/reference/language-bindings/csharp.md).

# C\#

The C# SDK is an async .NET 8 client for `antd` with both REST and gRPC transports.

## Install

```bash
cd antd-csharp
dotnet build Antd.sln
```

## Connect to the daemon

```csharp
using Antd.Sdk;

using var client = AntdClient.CreateRest(baseUrl: "http://localhost:8082");
var health = await client.HealthAsync();
Console.WriteLine(health.Network);
```

## Store and retrieve data

```csharp
using System.Text;
using Antd.Sdk;

using var client = AntdClient.CreateRest();
var result = await client.DataPutPublicAsync(Encoding.UTF8.GetBytes("Hello, Autonomi!"));
Console.WriteLine(result.Address);

var data = await client.DataGetPublicAsync(result.Address);
Console.WriteLine(Encoding.UTF8.GetString(data));
```

## Type mappings

| Autonomi type  | C# type        |
| -------------- | -------------- |
| `HealthStatus` | `HealthStatus` |
| `PutResult`    | `PutResult`    |
| Raw data       | `byte[]`       |

## Error handling

```csharp
try
{
    var data = await client.DataGetPublicAsync("nonexistent");
}
catch (NotFoundException)
{
    Console.WriteLine("Data not found");
}
catch (PaymentException)
{
    Console.WriteLine("Insufficient funds");
}
catch (AntdException ex)
{
    Console.WriteLine(ex.Message);
}
```

## Full API reference

For all available daemon endpoints, see the [REST API](/developers/sdk/install/reference/rest-api.md).