BlobVersionSasPermissions
 BlobVersionSasPermissions contains the list of
            permissions that can be set for a blob bersion.  Use
             SetPermissions
            to set the permissions on the  BlobSasBuilder.
            
                using System;
namespace Azure.Storage.Sas
{
    [Flags]
    public enum BlobVersionSasPermissions
    {
        Delete = 1,
        SetImmutabilityPolicy = 2,
        PermanentDelete = 4,
        All = -1
    }
}