Made a Gui and created a dropdown menu to select block

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();
+        }
+    }
 }