Rename private members to follow naming convention

src/SparseTransform/Convert/ColoredDotWriter.cs

@@ -8,8 +8,8 @@ namespace SparseTransform.Convert
     public class ColoredDotWriter : DotWriter
     {
         private IGraph _coloredGraph;
-        private bool textcolor;
-        private string[] dictColor = new string[65];
+        private bool _textcolor;
+        private string[] _dictColor = new string[65];
        
         /// <summary>
         /// Constructor constructing a color-dictionary for coloring purpose.
@@ -18,7 +18,7 @@ namespace SparseTransform.Convert
         public ColoredDotWriter(IGraph graph, bool textColor)
         {
             this._coloredGraph = graph;
-            this.textcolor = textColor;
+            this._textcolor = textColor;
 
             for (int i = 0; i <= 3; i++)
             {
@@ -26,7 +26,7 @@ namespace SparseTransform.Convert
                 {
                     for (int k = 0; k <= 4; k++)
                     {
-                        dictColor[i * 16 + j * 4 + k] = ("#" + (255 - i * 60).ToString("X2") + (255 - j * 60).ToString("X2") + (255 - k * 60).ToString("X2"));
+                        _dictColor[i * 16 + j * 4 + k] = ("#" + (255 - i * 60).ToString("X2") + (255 - j * 60).ToString("X2") + (255 - k * 60).ToString("X2"));
                     }
                 }
             }
@@ -40,13 +40,13 @@ namespace SparseTransform.Convert
         /// <returns></returns>
         public override String NodeLabel(GraphNode node, String prefix)
         {
-            if (textcolor || node.Color > 64)
+            if (_textcolor || node.Color > 64)
             {
                 return "\t" + prefix + node.Index + "  [shape=circle, style=filled, label=\"" + prefix + node.Index + "\\n Farbe " + node.Color + "\"]";
             }
             else
             {
-                return "\t" + prefix + node.Index + "  [shape=circle, style=filled, fillcolor=\"" + dictColor[node.Color] + "\"]";
+                return "\t" + prefix + node.Index + "  [shape=circle, style=filled, fillcolor=\"" + _dictColor[node.Color] + "\"]";
             }
         }
     }