Document async exception handling with ThrowsAsync #425
Description
Description
The .ThrowsAsync<TException>() method is missing from the async documentation.
Missing Documentation
.ThrowsAsync<TException>()- Throw exceptions from async methods- Variants with exception factories
Suggested Documentation
Add to the "Async Methods" subsection under Method Setup:
**Async Exception Handling**
Throw exceptions from async methods:
```csharp
sut.SetupMock.Method.DispenseAsync(It.Is(\"Invalid\"), It.IsAny<int>())
.ThrowsAsync<InvalidOperationException>();
// Or with a specific exception
sut.SetupMock.Method.DispenseAsync(It.Is(\"Error\"), It.IsAny<int>())
.ThrowsAsync(new InvalidChocolateException(\"Bad chocolate!\"));
// Or with a factory
sut.SetupMock.Method.DispenseAsync(It.IsAny<string>(), It.IsAny<int>())
.ThrowsAsync((type, amount) => new Exception($\"Cannot dispense {amount} {type}\"));