Made a Gui and created a dropdown menu to select block

Collector/src/Character/Collision.cs

@@ -5,7 +5,7 @@ namespace Collector.Character
 {
     public class Collision
     {
-        public RectangleF Rectangle { get; private set; }
+        public RectangleF Rectangle { get; }
         
         public Collision(int x, int y)
         {

Collector/src/Character/InputController.cs

@@ -166,10 +166,15 @@ namespace Collector.Character
             }
             if (mouseState.RightButton == ButtonState.Pressed)
             {
-                Chunks.PlaceBlock(PlayerMouse.GetSelectedX(),PlayerMouse.GetSelectedY(),Blocks.BlockWood);
+                PlaceSelectedBlock(Inventory.GetSelectedItem());
             }
         }
 
+        private static void PlaceSelectedBlock(Blocks selectedItem)
+        {
+            Chunks.PlaceBlock(PlayerMouse.GetSelectedX(), PlayerMouse.GetSelectedY(), selectedItem);
+        }
+
         private void UpdateAnimationFrame(GameTime gameTime)
         {
             _timeSinceLastFrame += gameTime.GetElapsedSeconds();

Collector/src/Character/Inventory.cs

@@ -1,8 +1,15 @@
 using System.Collections.Generic;
 using Collector.Dimension;
-    
+using Collector.UI;
+using Myra.Graphics2D.UI;
+
 public class Inventory {
     private LinkedList<ItemStack> inventory = new LinkedList<ItemStack>();
+    
+    public static Blocks GetSelectedItem()
+    {
+        return (Blocks) Gui._combo.SelectedIndex.Value;
+    }
 
     public LinkedList<ItemStack> GetInventory() {
         return inventory;

Collector/src/Dimension/Blocks.cs

@@ -1,15 +1,15 @@
 namespace Collector.Dimension
 {
-    public enum Blocks
+    public enum Blocks : byte
     {
-        BlockAir,
-        BlockGrass,
-        BlockWood,
-        BlockStone,
-        BlockSnow,
-        BlockSand,
-        BlockRoof,
-        BlockWall,
-        BlockWater
+        BlockAir = 0,
+        BlockGrass = 1,
+        BlockWood = 2,
+        BlockStone = 3,
+        BlockSnow = 4,
+        BlockSand = 5,
+        BlockRoof = 6,
+        BlockWall = 7,
+        BlockWater = 8
     }
 }

Collector/src/UI/GUI.cs

@@ -1,7 +1,79 @@
 
 
-using Collector;
+using System;
+using Collector.Dimension;
+using Microsoft.Xna.Framework;
+using Myra.Graphics2D.UI;
 
-public class GUI: IRestrictions {
+namespace Collector.UI
+{
+    public class Gui: IRestrictions {
+        private Desktop _desktop;
+        public static ComboBox _combo;
+        private TextButton _button;
 
+        public Gui(Desktop desktop)
+        {
+            _desktop = desktop;
+        }
+
+        public void LoadGUI()
+        {
+            var grid = new Grid
+            {
+                RowSpacing = 8,
+                ColumnSpacing = 8
+            };
+
+            grid.ColumnsProportions.Add(new Proportion(ProportionType.Auto));
+            grid.ColumnsProportions.Add(new Proportion(ProportionType.Auto));
+            grid.RowsProportions.Add(new Proportion(ProportionType.Auto));
+            grid.RowsProportions.Add(new Proportion(ProportionType.Auto));
+
+            
+            //Position
+            _combo = new ComboBox
+            {
+                GridColumn = 0,
+                GridRow = 0
+            };
+            _button = new TextButton
+            {
+                GridColumn = 1,
+                GridRow = 0,
+                Text = "Inventory"
+            };
+            
+            
+            foreach (Blocks name in Enum.GetValues(typeof(Blocks))) 
+            {
+                _combo.Items.Add(new ListItem(name.ToString(), Color.White));
+            }
+            
+            grid.Widgets.Add(_combo);
+            
+            
+            _button.Click += (s, a) =>
+            {
+                var messageBox = Dialog.CreateMessageBox("Message", "Some message!");
+                messageBox.ShowModal(_desktop);
+            };
+
+            grid.Widgets.Add(_button);
+
+            _desktop = new Desktop
+            {
+                Root = grid
+            };
+        }
+
+        public void Update()
+        {
+        }
+
+        public void Render()
+        {
+            _desktop.Render();
+        }
+    }
 }