first commit

sql2/Repositories/Repo.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace PaymentLogs.Repositories
+{
+    internal abstract class Repo<K, V>
+    {
+        protected Dictionary<K, V> _data = new Dictionary<K, V>();
+        public abstract void Load();
+        public virtual List<V> All()
+        {
+            return _data.Values.ToList();
+        }
+        public virtual V Get(K key) { return _data[key]; }
+        public virtual void Update(K key, V value)
+        {
+            _data[key] = value;
+        }
+        public abstract void Save();
+    }
+
+
+}