# TickStart Constructors

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.diagnostics.graintimerevents.tickstart/)

## TickStart(IGrainContext, IGrainTimer) {#constructor-orleans-runtime-igraincontext-orleans-runtime-igraintimer-b8ed903e}

[Dedicated page](/orleans/docs/api/csharp/microsoft.orleans.runtime/orleans.runtime.diagnostics.graintimerevents.tickstart/constructors/constructor-orleans-runtime-igraincontext-orleans-runtime-igraintimer-b8ed903e/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Runtime/Diagnostics/GrainTimerEvents.cs#L75)

```csharp
public TickStart(IGrainContext grainContext, IGrainTimer timer)
```

Event payload for when a grain timer tick callback is about to start.

### Parameters

- `grainContext` (`IGrainContext`): The grain context that owns the timer.
- `timer` (`IGrainTimer`): The timer instance.