GUI: Implement plugin interface

Il2CppInspector.GUI/EqualityConverter.cs

@@ -0,0 +1,30 @@
+// Copyright (c) 2020 Katy Coe - https://www.djkaty.com - https://github.com/djkaty
+// All rights reserved
+
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Text;
+using System.Windows;
+using System.Windows.Data;
+
+namespace Il2CppInspector.GUI
+{
+    // Adapted from https://stackoverflow.com/a/37307169 and https://stackoverflow.com/a/28316967
+    internal class EqualityConverter : IMultiValueConverter
+    {
+        public object TrueValue { get; set; }
+        public object FalseValue { get; set; }
+
+        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture) {
+            if (values.Length < 2)
+                return FalseValue;
+
+            return values[0].Equals(values[1]) ? TrueValue : FalseValue;
+        }
+
+        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) {
+            throw new NotImplementedException();
+        }
+    }
+}