garden_client/Assets/Script/Extension/ExtensionDictionary.cs

using UnityEngine;

using System.Linq;
using System.Collections;
using System.Collections.Generic;

public static class ExtensionDictionary
{

    public static T2 Random<T1, T2>(this Dictionary<T1, T2> dic)
    {
        return dic.Values.ToList().Random();
    }

    public static bool UniqueAdd<T1, T2>(this Dictionary<T1, T2> dic, T1 t1, T2 t2)
    {
        if (dic.ContainsKey(t1))
        {
            return false;
        }
        else
        {
            dic.Add(t1, t2);

            return true;
        }
    }
}