CryptoExchange.Net/CryptoExchange.Net/Interfaces/ISymbolOrderBookEntry.cs

namespace CryptoExchange.Net.Interfaces
{
    /// <summary>
    /// Interface for order book entries
    /// </summary>
    public interface ISymbolOrderBookEntry
    {
        /// <summary>
        /// The quantity of the entry
        /// </summary>
        decimal Quantity { get; set; }
        /// <summary>
        /// The price of the entry
        /// </summary>
        decimal Price { get; set; }
    }

    /// <summary>
    /// Interface for order book entries
    /// </summary>
    public interface ISymbolOrderSequencedBookEntry: ISymbolOrderBookEntry
    {
        /// <summary>
        /// Sequence of the update
        /// </summary>
        long Sequence { get; set; }
    }
}