first commit

NitroxModel/DataStructures/GameLogic/PDAEntry.cs

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+using System;
+using System.Runtime.Serialization;
+using BinaryPack.Attributes;
+
+namespace NitroxModel.DataStructures.GameLogic;
+
+[Serializable, DataContract]
+public class PDAEntry
+{
+    [DataMember(Order = 1)]
+    public NitroxTechType TechType { get; set; }
+
+    [DataMember(Order = 2)]
+    public int Unlocked { get; set; }
+
+    [IgnoreConstructor]
+    protected PDAEntry()
+    {
+        // Constructor for serialization. Has to be "protected" for json serialization.
+    }
+
+    public PDAEntry(NitroxTechType techType, int unlocked)
+    {
+        TechType = techType;
+        Unlocked = unlocked;
+    }
+}