Azure.Security.KeyVault.Keys (.NET)

Erwartetes Ergebnis:

```csharp
using Azure.Identity;
using Azure.Security.KeyVault.Keys;

var keyClient = new KeyClient(
new Uri("https://myvault.vault.azure.net/"),
new DefaultAzureCredential());

var createKeyOptions = new CreateRsaKeyOptions("my-rsa-key")
{
KeySize = 2048,
ExpiresOn = DateTimeOffset.Now.AddYears(1)
};

KeyVaultKey key = await keyClient.CreateRsaKeyAsync(createKeyOptions);
Console.WriteLine($"Created key: {key.Name}");
```

Erwartetes Ergebnis:

```csharp
var rotationPolicy = new KeyRotationPolicy
{
LifetimeActions =
{
new KeyLifetimeAction
{
Action = KeyRotationAction.Notify,
TimeBeforeExpiry = TimeSpan.FromDays(30)
}
}
};

await keyClient.UpdateKeyRotationPolicyAsync("my-key", rotationPolicy);
```