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# Async Operations
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Asynchronous versions of all certificate operations for high-performance applications. Includes async context managers and direct async results for long-running operations.
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## Capabilities
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### Async Client
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```python { .api }
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from azure.keyvault.certificates.aio import CertificateClient
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class CertificateClient:
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    """Async certificate client."""
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    async def create_certificate(
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        certificate_name: str,
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        policy: CertificatePolicy,
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        **kwargs
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    ) -> Union[KeyVaultCertificate, CertificateOperation]: ...
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    async def get_certificate(certificate_name: str) -> KeyVaultCertificate: ...
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    # All sync methods have async equivalents
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    # Long-running operations return results directly (no LROPoller)
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    async def __aenter__(self) -> "CertificateClient": ...
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    async def __aexit__(self, exc_type, exc_val, exc_tb) -> None: ...
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```
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## Usage Examples
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```python
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import asyncio
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from azure.identity.aio import DefaultAzureCredential
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from azure.keyvault.certificates.aio import CertificateClient
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from azure.keyvault.certificates import CertificatePolicy
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async def main():
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    # Create async client
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    credential = DefaultAzureCredential()
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    async with CertificateClient(
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        vault_url="https://my-vault.vault.azure.net/",
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        credential=credential
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    ) as client:
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        # Create certificate (returns result directly)
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        certificate = await client.create_certificate(
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            certificate_name="async-cert",
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            policy=CertificatePolicy.get_default()
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        )
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        print(f"Created: {certificate.name}")
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        # Get certificate
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        cert = await client.get_certificate("async-cert")
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        print(f"Retrieved: {cert.name}")
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        # List certificates with async iteration
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        async for cert_props in client.list_properties_of_certificates():
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            print(f"Certificate: {cert_props.name}")
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# Run async code
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asyncio.run(main())
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```