diff --git a/ILSpy/TreeNodes/AssemblyListTreeNode.cs b/ILSpy/TreeNodes/AssemblyListTreeNode.cs
index 569eef00a1..e53a3a8837 100644
--- a/ILSpy/TreeNodes/AssemblyListTreeNode.cs
+++ b/ILSpy/TreeNodes/AssemblyListTreeNode.cs
@@ -112,7 +112,7 @@ public override void Drop(DragEventArgs e, int index)
 							index--;
 						assemblyList.assemblies.RemoveAt(nodeIndex);
 					}
-					assemblies.Reverse();
+					Array.Reverse(assemblies);
 					foreach (LoadedAssembly asm in assemblies) {
 						assemblyList.assemblies.Insert(index, asm);
 					}