diff --git a/src/graph/DirectedGraph.cs b/src/graph/DirectedGraph.cs
index 1eaaff2..a9f7e61 100644
--- a/src/graph/DirectedGraph.cs
+++ b/src/graph/DirectedGraph.cs
@@ -129,8 +129,7 @@ namespace Encompass
                 output.Add(vertex, new Dictionary<SearchSymbol, uint>());
             }
 
-            Action<T> dfsHelper = null;
-            dfsHelper = (T v) =>
+            void dfsHelper(T v)
             {
                 discovered.Add(v);
                 time += 1;
@@ -259,8 +258,7 @@ namespace Encompass
 
         public IEnumerable<IEnumerable<T>> SimpleCycles()
         {
-            Action<T, HashSet<T>, Dictionary<T, HashSet<T>>> unblock = null;
-            unblock = (T thisnode, HashSet<T> blocked, Dictionary<T, HashSet<T>> B) =>
+            void unblock(T thisnode, HashSet<T> blocked, Dictionary<T, HashSet<T>> B)
             {
                 var stack = new Stack<T>();
                 stack.Push(thisnode);