/// <summary>
/// Attach and create the lease of the disk to the virtual machine. This
/// operation can take a while to complete.
/// </summary>
/// <param name='operations'>
/// The operations group for this extension method.
/// </param>
/// <param name='resourceGroupName'>
/// The name of the resource group.
/// </param>
/// <param name='labName'>
/// The name of the lab.
/// </param>
/// <param name='userName'>
/// The name of the user profile.
/// </param>
/// <param name='name'>
/// The name of the disk.
/// </param>
/// <param name='attachDiskProperties'>
/// Properties of the disk to attach.
/// </param>
/// <param name='cancellationToken'>
/// The cancellation token.
/// </param>
public static async Task BeginAttachAsync(this IDisksOperations operations, string resourceGroupName, string labName, string userName, string name, AttachDiskProperties attachDiskProperties, CancellationToken cancellationToken = default(CancellationToken))
{
(await operations.BeginAttachWithHttpMessagesAsync(resourceGroupName, labName, userName, name, attachDiskProperties, null, cancellationToken).ConfigureAwait(false)).Dispose();
}