Fixing it up a bit

Author: StanleyGoldman

src/GitHub.Api/Installer/CopyHelper.cs

@@ -31,14 +31,17 @@ public static void Copy(NPath fromPath, NPath toPath)
                     throw;
                 }
             }
+            finally
+            {
+                fromPath.DeleteIfExists();
+            }
         }
         public static void CopyFolder(NPath fromPath, NPath toPath)
         {
             Logger.Trace("CopyFolder fromPath: {0} toPath:{1}", fromPath.ToString(), toPath.ToString());
 
             toPath.EnsureParentDirectoryExists();
             fromPath.Move(toPath);
-            fromPath.Delete();
         }
 
         public static void CopyFolderContents(NPath fromPath, NPath toPath)
@@ -47,7 +50,6 @@ public static void CopyFolderContents(NPath fromPath, NPath toPath)
 
             toPath.DeleteContents();
             fromPath.MoveFiles(toPath, true);
-            fromPath.Delete();
         }
     }
 }