Azure.Storage.FileStorageAsync.UploadFileAsync C# (CSharp) Method

        public async Task UploadFileAsync(string directoryName, string fileName, string sourceFilePath)
        {
            Validate.String(directoryName, "directoryName");
            Validate.String(fileName, "fileName");
            Validate.String(sourceFilePath, "sourceFilePath");

            var rootDirectory = cloudFileShare.GetRootDirectoryReference();
            var directoryToUpdate = rootDirectory.GetDirectoryReference(directoryName);
            var file = directoryToUpdate.GetFileReference(fileName);
            if (!file.Exists())
            {
                file.Create(long.MaxValue);
            }

            await file.UploadFromFileAsync(sourceFilePath);
        }