AWS SDK Version 3 for .NET
API Reference

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Determines whether an S3 bucket exists or not. This is done by: 1. Creating a PreSigned Url for the bucket. To work with Signature V4 only regions, as well as Signature V4-optional regions, we keep the expiry to within the maximum for V4 (which is one week). 2. Making a HEAD request to the Url


This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginDoesS3BucketExist and EndDoesS3BucketExist.

Namespace: Amazon.S3.Util
Assembly: AWSSDK.S3.dll
Version: 3.x.y.z


public Task<Boolean> DoesS3BucketExistAsync(
         IAmazonS3 s3Client,
         String bucketName
Type: Amazon.S3.IAmazonS3

The Amazon S3 Client to use for S3 specific operations.

Type: System.String

The name of the bucket to check.

Return Value
Type: Task<Boolean>

Version Information

.NET Standard:
Supported in: 1.3

.NET Framework:
Supported in: 4.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms