/// <summary>
/// Returns the number of fields contained in the hash stored at key.
/// </summary>
/// <returns>The number of fields in the hash, or 0 when key does not exist.</returns>
/// <remarks>https://redis.io/commands/hlen</remarks>
public Task <long> LengthAsync()
{
return(RedisDb.HashLengthAsync(KeyName));
}
