Восстановил проект Logic

StructureHelperLogics/Data/Shapes/Rectangle.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StructureHelperLogics.Data.Shapes
+{
+    /// <inheritdoc />
+    public class Rectangle : IRectangle
+    {
+        /// <inheritdoc />
+        public double Width { get; set; }
+        /// <inheritdoc />
+        public double Height { get; set; }
+        /// <inheritdoc />
+        public double Angle { get; set; }
+    }
+}