mvvm command (need to fix)

PacticeSolution/MVVMButtonControl/ViewModel/ModelViewMain.cs

@@ -0,0 +1,62 @@
+using MVVMButtonControl.Model;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Controls;
+using System.Windows.Input;
+using System.Windows.Media;
+
+namespace MVVMButtonControl.ViewModel
+{
+    internal class ModelViewMain
+    {
+        public ObservableCollection<Buttons> _buttonCollections;
+
+        public ICommand TestCommand { get; private set; }
+
+        public ICommand SubButtonCommand { get; private set; }
+
+
+        public ModelViewMain()
+        {
+            _buttonCollections = new ObservableCollection<Buttons>();
+            this.TestCommand = new RelayCommand<object>(CommandMethod);
+            this.SubButtonCommand = new RelayCommand<object>(SubCommandMethod);
+        }
+
+        public ObservableCollection<Buttons>  ButtonCollection
+        {
+            get { return _buttonCollections; }
+            set
+            {
+                if (_buttonCollections != null)
+                    _buttonCollections = value;
+            }
+        }
+
+        private void CommandMethod(object parameter)
+        {
+            for (int i = 0; i < 4; i++)
+            {
+                this.ButtonCollection.Add(new Buttons { Name = $"Button {i}", SelectedColor = Brushes.Transparent });
+            }
+        }
+
+        private void SubCommandMethod(object parameter)
+        {
+            for (int i = 0; i < this.ButtonCollection.Count; i++)
+            {
+                this.ButtonCollection[i].SelectedColor = Brushes.Transparent;
+            }
+
+            Buttons selected = this.ButtonCollection.Where(b => b.Name.Equals(parameter.ToString())).SingleOrDefault();
+            if (selected == null)
+                return;
+
+            selected.SelectedColor = Brushes.LightCoral;
+        }
+    }
+}