Force combination was added

Infrastructure/UI/Converters/Units/Area.cs

@@ -1,4 +1,6 @@
-using System;
+using StructureHelperCommon.Infrastructures.Enums;
+using StructureHelperCommon.Services.Units;
+using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
@@ -11,33 +13,8 @@ namespace StructureHelper.Infrastructure.UI.Converters.Units
 {
     internal class Area : UnitBase
     {
+        public override UnitTypes unitType { get => UnitTypes.Area; }
+        public override IUnit currentUnit { get => CommonOperation.GetUnit(unitType, "mm2"); }
         public override string unitName { get => "Area"; }
-
-        public override string MeasureUnit => throw new NotImplementedException();
-
-        public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
-        {
-            double val;
-            if (value != null) { val = (double)value; }
-            else { throw new Exception($"{unitName} value is null"); }
-            val *= UnitConstatnts.Length * UnitConstatnts.Length;
-            return val;
-        }
-
-        public override object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
-        {
-            double val;
-            try
-            {
-                var strVal = value as string;
-                val = CommonOperation.ConvertToDoubleChangeComma(strVal);
-            }
-            catch
-            {
-                return null;
-            }
-            val /= (UnitConstatnts.Length * UnitConstatnts.Length);
-            return val;
-        }
     }
 }