MARKUS

                    var pageWidth = ViewerDataModel.Instance.ImageViewWidth;

                    var pageHeight = ViewerDataModel.Instance.ImageViewHeight;

                    //var infoId = Commons.shortGuid();

                    //PreviewUserMarkupInfoItem = new MarkupInfoItem

                    //{

                    //    CreateTime = DateTime.Now,

                    //    UpdateTime = DateTime.Now,

                    //    Depatment = userData.DEPARTMENT,

                    //    DisplayColor = "#FFFF0000",

                    //    UserID = userData.ID,

                    //    UserName = userData.NAME,

                    //    PageCount = 1,

                    //    Description = "",

                    //    MarkupInfoID = infoId,

                    //    MarkupList = null,

                    //    MarkupVersionID = Commons.shortGuid(),

                    //    Consolidate = 0,

                    //    PartConsolidate = 0,

                    //    userDelete = true,

                    //    AvoidConsolidate = 0,

                    //    IsPreviewUser = false

                    //};

                    //App.Custom_ViewInfoId = infoId;

                    //ViewerDataModel.Instance._markupInfoList.Insert(0, PreviewUserMarkupInfoItem);

            instanceMain.dzMainMenu.CanvasDrawingMouseDownPoint = new Point(ViewerDataModel.Instance.ImageViewWidth / 2, ViewerDataModel.Instance.ImageViewHeight / 2);

                if (!ViewerDataModel.Instance.IsPressCtrl)

                {

                    SelectionSet.Instance.UnSelect(this);

                }

    <Compile Include="UniqueColorGenerator.cs" />

using ColorSelector;

                    }

                    if (_ColorsProperties.Count() == 0)

                    {

                        ColorGenerator uniqueColorGenerator = new ColorGenerator(System.Drawing.Color.Red); // 2303 = (int)Color.Red

                        uniqueColorGenerator.GetEnumerator(_result.Count());

                        for (int i = 0; i < _result.Count(); i++)

                        {

                             var c = uniqueColorGenerator.GetNext();

                            _ColorsProperties.Add(new PROPERTIES { VALUE = String.Format("{0:X2}{1:X2}{2:X2}",c.R, c.G,c.B) });

                        }

using System;

using System.Collections;

using System.Collections.Generic;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Media;

namespace ColorSelector

{

    public class ColorGenerator : IEnumerable<Color>

    {

        const int RandomSeed = 2;

        private List<Color> _generatorColors;

        private readonly Random _random;

        private  Color _FirstColor;

        public ColorGenerator(Color FirstColor)

        {

            _generatorColors = new List<Color>();

            _FirstColor = FirstColor;

            _random = new Random(RandomSeed);

        }

        bool flag = false;

        private int MaxValue(int value,int max)

        {

            if(value > max)

            {

                return MaxValue(Math.Abs(value - max),max);

            }

            else

            {

                return value;

            }

        }

        public Color GetNext()

        {

            int colorRed = MaxValue(_random.Next(255) + (flag ? _FirstColor.R : 0),255);

            int colorBlue = MaxValue(_random.Next(255) + _FirstColor.B,255);

            int colorGreen = MaxValue(_random.Next(255) + _FirstColor.G, 255);

            flag = flag ? false : true;

            Color color = Color.FromArgb(255, colorRed, colorBlue, colorGreen);

            //// make the color fully opaque

            //color.A = 255;

            //color.R = colorRed;

            //color.B = colorBlue;

            //color.G = colorGreen;

           var marthCount = this.Count(c => Math.Abs(c.R - colorRed) < 6 && Math.Abs(c.G - colorGreen) < 6 && Math.Abs(c.B - colorBlue) < 6);

            if (marthCount > 0 || colorRed < 80 || colorBlue < 80 || colorGreen < 80)

            {

                color = GetNext();

            }

            else

            {

                _generatorColors.Add(color);

            }

            _FirstColor = color;

            return color;

        }

        public IEnumerator<Color> GetEnumerator( int Count)

        {

            foreach (var item in Enumerable.Range(0, Count))

            {

                yield return GetNext();

            }

        }

        IEnumerator IEnumerable.GetEnumerator()

        {

            return _generatorColors.GetEnumerator();

        }

        public IEnumerator<Color> GetEnumerator()

        {

            return _generatorColors.GetEnumerator();

        }

    }

}