public void AddPerimeterVertices(int vertexCount)
        {
            QGVertexControl[] newVertices = new QGVertexControl[vertexCount];
            for (int i = 0; i < vertexCount; i++)
            {
                newVertices[i] = new QGVertexControl();
            }

            this.AddPerimeterVertices(newVertices);
        }
 public void AddPerimeterVertex(QGVertexControl vertex) => this.AddPerimeterVertices(new QGVertexControl[] { vertex });
 public void RemovePerimeterVertex(QGVertexControl vertex) => this.RemovePerimeterVertices(new QGVertexControl[] { vertex });