# Datastar + dotnet
Real-time Hypermedia first Library and Framework for dotnet
# HTML Frontend
```html
D* Demo
```
# C# Backend
```csharp
using StarFederation.Datastar;
using StarFederation.Datastar.DependencyInjection;
using System.Text.Json;
using System.Text.Json.Serialization;
...
// define your signals
public record DatastarSignals : ISignals
{
[JsonPropertyName("input")]
[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
public string? Input { get; init; } = null;
[JsonPropertyName("output")]
[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
public string? Output { get; init; } = null;
public string Serialize() => JsonSerializer.Serialize(this);
}
...
// add as an ASP Service
// allows injection of IServerSentEventGenerator, to respond to a request with a Datastar friendly ServerSentEvent
// and ISignals, to read the signals sent by the client
builder.Services.AddDatastar();
...
app.UseStaticFiles();
// add endpoints
app.MapGet("/displayDate", async (IServerSentEventGenerator sse) =>
{
string today = DateTime.Now.ToString("%y-%M-%d %h:%m:%s");
await sse.MergeFragments($"""