diff --git a/crates/csharp/src/lib.rs b/crates/csharp/src/lib.rs
index 7b9253ed7..e4d574d3b 100644
--- a/crates/csharp/src/lib.rs
+++ b/crates/csharp/src/lib.rs
@@ -1444,6 +1444,11 @@ impl InterfaceGenerator<'_> {
                     .map(|key| self.resolve.name_world_key(key))
                     .unwrap_or_else(|| "$root".into());
 
+                // As of this writing, we cannot safely drop a handle to an imported resource from a .NET finalizer
+                // because it may still have one or more open child resources.  Once WIT has explicit syntax for
+                // indicating parent/child relationships, we should be able to use that information to keep track
+                // of child resources automatically in generated code, at which point we'll be able to drop them in
+                // the correct order from finalizers.
                 uwriteln!(
                     self.src,
                     r#"
@@ -1458,22 +1463,17 @@ impl InterfaceGenerator<'_> {
 
                         public void Dispose() {{
                             Dispose(true);
-                            GC.SuppressFinalize(this);
                         }}
 
                         [DllImport("{module_name}", EntryPoint = "[resource-drop]{name}"), WasmImportLinkage]
                         private static extern void wasmImportResourceDrop(int p0);
 
                         protected virtual void Dispose(bool disposing) {{
-                            if (Handle != 0) {{
+                            if (disposing && Handle != 0) {{
                                 wasmImportResourceDrop(Handle);
                                 Handle = 0;
                             }}
                         }}
-
-                        ~{upper_camel}() {{
-                            Dispose(false);
-                        }}
                     "#
                 );
             }
diff --git a/crates/moonbit/src/lib.rs b/crates/moonbit/src/lib.rs
index 86379d270..5fd190fff 100644
--- a/crates/moonbit/src/lib.rs
+++ b/crates/moonbit/src/lib.rs
@@ -149,14 +149,35 @@ pub extern "wasm" fn ptr2int_array(ptr : Int) -> FixedArray[Int] =
 pub extern "wasm" fn ptr2float_array(ptr : Int) -> FixedArray[Float] =
   #|(func (param i32) (result i32) local.get 0 i32.const 4 i32.sub i32.const 241 i32.store8 local.get 0 i32.const 8 i32.sub)
 
-pub extern "wasm" fn ptr2uint64_array(ptr : Int) -> FixedArray[UInt64] =
-  #|(func (param i32) (result i32) local.get 0 i32.const 4 i32.sub i32.load i32.const 1 i32.shr_u i32.const 241 i32.or local.get 0 i32.const 4 i32.sub i32.store local.get 0 i32.const 8 i32.sub)
+extern "wasm" fn ptr2uint64_array_ffi(ptr : Int) -> FixedArray[UInt64] =
+  #|(func (param i32) (result i32) local.get 0 i32.const 8 i32.sub)
+
+pub fn ptr2uint64_array(ptr : Int) -> FixedArray[UInt64] {
+  set_64_header_ffi(ptr - 4)
+  ptr2uint64_array_ffi(ptr)
+}
 
-pub extern "wasm" fn ptr2int64_array(ptr : Int) -> FixedArray[Int64] =
-  #|(func (param i32) (result i32) local.get 0 i32.const 4 i32.sub i32.load i32.const 1 i32.shr_u i32.const 241 i32.or local.get 0 i32.const 4 i32.sub i32.store local.get 0 i32.const 8 i32.sub)
+extern "wasm" fn ptr2int64_array_ffi(ptr : Int) -> FixedArray[Int64] =
+  #|(func (param i32) (result i32) local.get 0 i32.const 8 i32.sub)
+
+pub fn ptr2int64_array(ptr : Int) -> FixedArray[Int64] {
+  set_64_header_ffi(ptr - 4)
+  ptr2int64_array_ffi(ptr)
+}
 
-pub extern "wasm" fn ptr2double_array(ptr : Int) -> FixedArray[Double] =
-  #|(func (param i32) (result i32) local.get 0 i32.const 4 i32.sub i32.load i32.const 1 i32.shr_u i32.const 241 i32.or local.get 0 i32.const 4 i32.sub i32.store local.get 0 i32.const 8 i32.sub)
+extern "wasm" fn ptr2double_array_ffi(ptr : Int) -> FixedArray[Double] =
+  #|(func (param i32) (result i32) local.get 0 i32.const 8 i32.sub)
+
+pub fn ptr2double_array(ptr : Int) -> FixedArray[Double] {
+  set_64_header_ffi(ptr - 4)
+  ptr2double_array_ffi(ptr)
+}
+
+fn set_64_header_ffi(offset : Int) -> Unit {
+  let len = load32(offset)
+  store32(offset, len.lsr(1))
+  store8(offset, 241)
+}
 
 pub trait Any {}
 pub struct Cleanup {