Merge sort didnt add lol

Assets/Scripts/monopoly/MergeSort.cs

@@ -0,0 +1,71 @@
+using System.Collections.Generic;
+using System.Linq;
+
+public static class MergeMethod
+{
+	public static List<Property> MergeSort(List<Property> unsorted)
+	{	
+		
+		if (unsorted.Count <= 1) //Checks if the list is longer than 1 to do a merge sort
+		{
+			return unsorted; //Stops the function if the length is 1 or less
+		}
+
+		int middle = unsorted.Count / 2; //Does an integer division of 2
+
+		List<Property> left = new List<Property>(); //Creates a list for the left items in the list.
+		List<Property> right = new List<Property>(); //Creates a list for the right items in the list.
+
+
+		for (int i = 0; i < middle; i++) //Adds the left half of the unsorted list to the left list.
+		{
+			left.Add(unsorted[i]);
+		}
+
+		for (int i = middle; i < unsorted.Count; i++) //Adds the rest of the unsorted list to the right list.
+		{
+			right.Add(unsorted[i]);
+		}
+		
+		//Uses recursion to get to return early.
+		left = MergeSort(left);
+		right = MergeSort(right);
+		
+		//Merges the lists.
+		return Merge(left, right);
+	}
+
+	private static List<Property> Merge(List<Property> left, List<Property> right)
+	{
+		List<Property> sorted = new List<Property>(); //Creates the list with the sort.
+
+		while (left.Count > 0 || right.Count > 0) //While operates as the left and right lists aren't empty.
+		{
+			if (left.Count > 0 && right.Count > 0) //Checks if none of the lists are empty.
+			{
+				if (left.First().property_id <= right.First().property_id) //Checks if the left one is smaller than the right one.
+				{
+					sorted.Add(left.First());
+					left.Remove(left.First());
+				}
+				else //If the right one is smaller than the left one then...
+				{
+					sorted.Add(right.First());
+					right.Remove(right.First());
+				}
+			}
+			else if (left.Count > 0) //Runs if the only list left is the left one.
+			{
+				sorted.Add(left.First());
+				left.Remove(left.First());
+			}
+			else if (right.Count > 0) //Runs if the only list left is the right one.
+			{
+				sorted.Add(right.First());
+				right.Remove(right.First());
+			}
+		}
+
+		return sorted; //Returns the sorted list.
+	}
+}