Добавьте файлы проекта.

Geometry/Vector.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Geo
+{
+    [Serializable]
+    public class Vector : IVector
+    {
+        double[] arr;
+        int n;
+
+        public int N { get => n; }
+        public double this[int i] { get => arr[i]; set => arr[i] = value; }
+
+        public Vector(int N)
+        {
+            n = N;
+            arr = new double[N];
+        }
+
+        public Vector(Vector source)
+        {
+            n = source.N;
+            arr = new double[source.N];
+            arr = (double[])source.arr.Clone();
+        }
+
+        public Vector(Vector3d source)
+        {
+            n = 3;
+            arr = new double[n];
+            arr[0] = source.Vx;
+            arr[1] = source.Vy;
+            arr[2] = source.Vz;
+        }
+
+        public Vector(double[] source)
+        {
+            n = source.Length;
+            arr = new double[source.Length];
+            arr = (double[])source.Clone();
+        }
+
+        public double[] ToArray()
+        {
+            return arr;
+        }
+
+        public Vector3d ToVector3d()
+        {
+            return new Vector3d { Vx = arr[0], Vy = arr[1], Vz = arr[2] };
+        }
+    }
+}