using System;

public class Program

{

    public static void Main()

    {

        var match = new Match() {

            Id = Guid.NewGuid(),

            Time = DateTime.Now

        };

        var cacheKey = new MatchCacheKey(match.Id);

        Console.WriteLine("CacheKey Value: {0}", cacheKey.CacheKey);

    }

    public class Match {

        public Guid Id {get;set;}

        public DateTime Time {get;set;}

    }

    public class MatchCacheKey : ICacheKey<Match> 

    {   

        private readonly Guid _matchId;

​

        public MatchCacheKey(Guid matchId){

            _matchId = matchId;

        }

​

        public string CacheKey => $"MatchId_{_matchId.ToString("N")}";

    }

    public interface ICacheKey<TItem> where TItem : class

    { 

        string CacheKey { get; }

    }

}