ArcMapAddinVisibility.ViewModels.RLOSViewModel.UnqueValueRenderer C# (CSharp) Метод

        public IFeatureRenderer UnqueValueRenderer(IFeatureWorkspace workspace, IFeatureClass fc)
        {
            try
            {
                string tablename = ((IDataset)fc).BrowseName;
                ITable ipTable = workspace.OpenTable(tablename);

                IFeatureCursor featureCursor = fc.Search(null, false);
                IDataStatistics dataStatistics = new DataStatisticsClass();
                dataStatistics.Cursor = featureCursor as ICursor;
                dataStatistics.Field = "gridcode";

                System.Collections.IEnumerator enumerator = dataStatistics.UniqueValues;
                enumerator.Reset();

                while (enumerator.MoveNext())
                {
                    object myObject = enumerator.Current;
                }

                int uniqueValues = dataStatistics.UniqueValueCount;

                //Create colors for each unique value.
                IRandomColorRamp colorRamp = new RandomColorRampClass();
                colorRamp.Size = uniqueValues;
                colorRamp.Seed = 100;
                bool createColorRamp;
                colorRamp.CreateRamp(out createColorRamp);
                if (createColorRamp == false)
                {
                    return null;
                }

                IUniqueValueRenderer uvRenderer = new UniqueValueRendererClass();
                IFeatureRenderer featRenderer = (IFeatureRenderer)uvRenderer;

                uvRenderer.FieldCount = 1;

                ISimpleFillSymbol fillSymbol = new SimpleFillSymbolClass();
                ISimpleFillSymbol fillSymbol2 = new SimpleFillSymbolClass();
                if (ShowNonVisibleData == true)
                {
                    fillSymbol.Color = new RgbColorClass() { Red = 255 } as IColor;
                    uvRenderer.AddValue("0", "", fillSymbol as ISymbol);
                    uvRenderer.set_Label("0", "Non-Visible");
                }
                    fillSymbol2.Color = new RgbColorClass() { Green = 255 } as IColor;
                    uvRenderer.AddValue("1", "", fillSymbol2 as ISymbol);
                    uvRenderer.set_Label("1", "Visible by 1 Observer");

                    int field = ipTable.FindField("gridcode");
                    uvRenderer.set_Field(0, "gridcode");

                    for (int i = 2; i < uniqueValues; i++)
                    {
                        ISimpleFillSymbol newFillSymbol = new SimpleFillSymbolClass();
                        newFillSymbol.Color = colorRamp.get_Color(i);
                        uvRenderer.AddValue(i.ToString(), "", newFillSymbol as ISymbol);
                        string label = "Visible by " + i.ToString() + " Observers";
                        uvRenderer.set_Label(i.ToString(), label);
                    }

                return featRenderer;
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(ex.Message);
                return null;
            }
        }