diff --git a/csharp/Euler/include/prime.cs b/csharp/Euler/include/prime.cs
index 190289ca..1859bbcb 100644
--- a/csharp/Euler/include/prime.cs
+++ b/csharp/Euler/include/prime.cs
@@ -125,7 +125,7 @@ public static long isComposite(long n)
         {
             var factors = PrimeFactors(n).GetEnumerator();
             factors.MoveNext();
-            long first = factors.current;
+            long first = factors.Current;
             if (first == n)
                 return 0;
             return first;