https://learn.microsoft.com/zh-tw/dotnet/api/azure.storage.blobs.specialized.appendblobclient.createifnotexists?view=azure-dotnet
AppendBlobClient.CreateIfNotExists Method (Azure.Storage.Blobs.Specialized) - Azure for .NET...
The CreateIfNotExists(AppendBlobCreateOptions, CancellationToken) operation creates a new 0-length append blob. If the append blob already exists, the content...
azure storagemethodblobsspecialized