public void ValidData() { DrawingTool cnv = new DrawingTool(20, 4); string result = string.Empty; cnv.DrawCanvas(); cnv.DrawLine(new string[] { "1", "2", "6", "2" }); cnv.DrawLine(new string[] { "6", "3", "6", "4" }); cnv.DrawRectangle(new string[] { "16", "1", "20", "3" }); cnv.FillCanvas(10, 3, "o"); Console.WriteLine(cnv.DrawArray(cnv.Canvas)); }