Восстановил проект Logic

StructureHelperLogics/Data/Shapes/Center.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StructureHelperLogics.Data.Shapes
+{
+    /// <inheritdoc />
+    public class Center : ICenter
+    {
+        /// <inheritdoc />
+        public double CenterX { get; set; }
+        /// <inheritdoc />
+        public double CenterY { get; set; }
+    }
+}

StructureHelperLogics/Data/Shapes/ICenter.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StructureHelperLogics.Data.Shapes
+{
+    /// <summary>
+    /// Interface for point of center of some shape
+    /// Интерфейс для точки центра некоторой формы
+    /// </summary>
+    public interface ICenter
+    {
+        /// <summary>
+        /// Coordinate of center of rectangle by local axis X, m
+        /// Координата центра вдоль локальной оси X, м
+        /// </summary>
+        double CenterX { get;}
+        /// <summary>
+        /// Coordinate of center of rectangle by local axis Y, m
+        /// Координата центра вдоль локальной оси Y, м
+        /// </summary>
+        double CenterY { get;}
+    }
+}

StructureHelperLogics/Data/Shapes/IRectangle.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace StructureHelperLogics.Data.Shapes
+{
+    public interface IRectangle
+    {
+        /// <summary>
+        /// Width of rectangle, m
+        /// </summary>
+        double Width { get; }
+        /// <summary>
+        /// Height of rectangle, m
+        /// </summary>
+        double Height { get; }
+        /// <summary>
+        /// Angle of rotating rectangle, rad
+        /// </summary>
+        double Angle { get; }
+    }
+}

StructureHelperLogics/Data/Shapes/Rectangle.cs

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+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; }
+    }
+}