added a utility class that stores a layer, an x and a y

MLEM.Extended/Tiled/LayerPosition.cs

@@ -0,0 +1,48 @@
+using System.Runtime.Serialization;
+
+namespace MLEM.Extended.Tiled {
+    [DataContract]
+    public struct LayerPosition {
+
+        [DataMember]
+        public string Layer;
+        [DataMember]
+        public int X;
+        [DataMember]
+        public int Y;
+
+        public LayerPosition(string layerName, int x, int y) {
+            this.Layer = layerName;
+            this.X = x;
+            this.Y = y;
+        }
+
+        public static bool operator ==(LayerPosition left, LayerPosition right) {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(LayerPosition left, LayerPosition right) {
+            return !left.Equals(right);
+        }
+
+        public bool Equals(LayerPosition other) {
+            return this.Layer == other.Layer && this.X == other.X && this.Y == other.Y;
+        }
+
+        public override bool Equals(object obj) {
+            return obj is LayerPosition other && this.Equals(other);
+        }
+
+        public override int GetHashCode() {
+            var hashCode = this.Layer.GetHashCode();
+            hashCode = (hashCode * 397) ^ this.X;
+            hashCode = (hashCode * 397) ^ this.Y;
+            return hashCode;
+        }
+
+        public override string ToString() {
+            return $"{nameof(this.Layer)}: {this.Layer}, {nameof(this.X)}: {this.X}, {nameof(this.Y)}: {this.Y}";
+        }
+
+    }
+}