Adding documentation to ColoredDotWriter

src/SparseTransform/Convert/ColoredDotWriter.cs

@@ -12,7 +12,11 @@ namespace SparseTransform.Convert
     {
         private bool textcolor;
         private string[] dictColor = new string[65];
-
+       
+        /// <summary>
+        /// Constructor constructing a color-dictionary for color purpose.
+        /// </summary>
+        /// <param name="textColor">decision whether the labels should be colored or labelled.</param>
         public ColoredDotWriter(bool textColor)
         {
             this.textcolor = textColor;
@@ -29,6 +33,13 @@ namespace SparseTransform.Convert
             }
         }
 
+       
+        /// <summary>
+        /// Labels the node with the respective colors determined by it's index. Overrides the method in DotWriter 
+        /// </summary>
+        /// <param name="node">the node to be labeld</param>
+        /// <param name="präfix">the paefix of the node-name (either 'c_' or 'r_'</param>
+        /// <returns></returns>
         public override String NodeLabel(GraphNode node, String präfix)
         {
             if (textcolor || node.Color > 64)