Fix IsExternalInit

BloonsTD6 Mod Helper/GlobalUsings.cs

@@ -4,4 +4,18 @@
 global using Il2CppInterop.Runtime.InteropTypes;
 global using Il2CppInterop.Runtime.Runtime;
 global using Il2CppInterop.Runtime.InteropTypes.Arrays;
-global using Il2Cpp;
+global using Il2Cpp;
+using System.ComponentModel;
+
+// ReSharper disable once CheckNamespace
+namespace System.Runtime.CompilerServices
+{
+    /// <summary>
+    /// Reserved to be used by the compiler for tracking metadata.
+    /// This class should not be used by developers in source code.
+    /// </summary>
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    internal static class IsExternalInit
+    {
+    }
+}