Got the bones of the inventory

Assets/Scripts/monopoly/ButtonHandler.cs

@@ -18,7 +18,7 @@ public class ButtonHandler : MonoBehaviour
     public Button inventory;
     public TextMeshProUGUI inventoryText;
     private bool inventoryOpen = false;
-    
+    private Inventory inventoryClass;
 
     public void disableRollDice()
     {
@@ -42,6 +42,7 @@ public class ButtonHandler : MonoBehaviour
 
     void OpenInventory()
     {
+        inventoryClass.OpenInventory();
         GameUI.SetActive(false);
         PropertyUI.SetActive(true);
         inventoryText.text = "Close Inventory";
@@ -68,12 +69,12 @@ public class ButtonHandler : MonoBehaviour
         }
     }
 
-
     private Main main;
 
     void Awake()
     { 
         main = FindObjectOfType<Main>();
+        inventoryClass = FindObjectOfType<Inventory>();
     }
 
     void Start()

Assets/Scripts/monopoly/Inventory.cs

@@ -0,0 +1,71 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+using TMPro;
+
+public class Inventory : MonoBehaviour
+{
+
+    private Main main;
+    
+    //Inventory
+    public GameObject inventoryPanel;
+    public Button[] properties; //These are all of the buttons in the inventory corresponding to each unique property.
+    
+    //Property Panel
+    public GameObject propertyPanel;
+    public Button backButton;
+    public TextMeshProUGUI propertyName;
+    public Image propertyColour;
+    public Button buyHouse;
+    public Button sellHouse;
+    public Button Mortgage;
+
+    //This is the function that will be used when the user clicks to open the inventory.
+    public void OpenInventory() 
+    {
+        Player currentPlayer = main.board.players[main.board.currentPlayer]; //Initialises the current player to make the code look neater.
+        for (int i = 0; i < properties.Length; i++) //Checks through all of the buttons.
+        {
+            for (int j = 0; j < currentPlayer.ownedProperties.Count; j++) //Checks through all of the owned properties.
+            {
+                if (currentPlayer.ownedProperties[j].property_name == properties[i].name) //Checks if the names of the property is the same as the button name/
+                {
+                    properties[i].interactable = true; //Makes the button for the property interactable.
+                    break; //Stops the j for loop as the owned properties list is in order.
+                }
+            }
+        }
+    }
+
+    void OpenProperties(Button button)
+    {
+        inventoryPanel.SetActive(false);
+        propertyPanel.SetActive(true);
+        Debug.Log(button.name);
+    }
+
+    void CloseProperties()
+    {
+        propertyPanel.SetActive(false);
+        inventoryPanel.SetActive(true);
+    }
+    
+
+    private void Awake()
+    {
+        main = FindObjectOfType<Main>();
+    }
+
+    private void Start()
+    {
+        for (int i = 0; i < properties.Length; i++)
+        {
+            properties[i].onClick.AddListener(delegate { OpenProperties(properties[i]); });
+        }
+        
+        backButton.onClick.AddListener(CloseProperties);
+    }
+}

Assets/Scripts/monopoly/Inventory.cs.meta

@@ -0,0 +1,11 @@
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+guid: f0f66671b253015408df057494e40b89
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/monopoly/Main.cs

@@ -229,7 +229,7 @@ public class Board //Creating the class for the board mechanics.
 
 	public void Mortgage()
 	{
-		
+		//TODO
 	}
 }