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diff --git a/release-notes/7.0/preview/api-diff/rc1/Microsoft.AspNetCore.App/7.0-rc1_Microsoft.JSInterop.md b/release-notes/7.0/preview/api-diff/rc1/Microsoft.AspNetCore.App/7.0-rc1_Microsoft.JSInterop.md
new file mode 100644
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+++ b/release-notes/7.0/preview/api-diff/rc1/Microsoft.AspNetCore.App/7.0-rc1_Microsoft.JSInterop.md
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+# Microsoft.JSInterop
+
+``` diff
+ namespace Microsoft.JSInterop {
+     public interface IJSUnmarshalledObjectReference : IAsyncDisposable, IDisposable, IJSInProcessObjectReference, IJSObjectReference {
+-        TResult InvokeUnmarshalled<T0, T1, T2, TResult>(string identifier, T0 arg0, T1 arg1, T2 arg2);
++        [ObsoleteAttribute("This method is obsolete. Use JSImportAttribute instead.")]
++        TResult InvokeUnmarshalled<T0, T1, T2, TResult>(string identifier, T0 arg0, T1 arg1, T2 arg2);
+-        TResult InvokeUnmarshalled<T0, T1, TResult>(string identifier, T0 arg0, T1 arg1);
++        [ObsoleteAttribute("This method is obsolete. Use JSImportAttribute instead.")]
++        TResult InvokeUnmarshalled<T0, T1, TResult>(string identifier, T0 arg0, T1 arg1);
+-        TResult InvokeUnmarshalled<T0, TResult>(string identifier, T0 arg0);
++        [ObsoleteAttribute("This method is obsolete. Use JSImportAttribute instead.")]
++        TResult InvokeUnmarshalled<T0, TResult>(string identifier, T0 arg0);
+-        TResult InvokeUnmarshalled<TResult>(string identifier);
++        [ObsoleteAttribute("This method is obsolete. Use JSImportAttribute instead.")]
++        TResult InvokeUnmarshalled<TResult>(string identifier);
+     }
+     public interface IJSUnmarshalledRuntime {
+-        TResult InvokeUnmarshalled<T0, T1, T2, TResult>(string identifier, T0 arg0, T1 arg1, T2 arg2);
++        [ObsoleteAttribute("This method is obsolete. Use JSImportAttribute instead.")]
++        TResult InvokeUnmarshalled<T0, T1, T2, TResult>(string identifier, T0 arg0, T1 arg1, T2 arg2);
+-        TResult InvokeUnmarshalled<T0, T1, TResult>(string identifier, T0 arg0, T1 arg1);
++        [ObsoleteAttribute("This method is obsolete. Use JSImportAttribute instead.")]
++        TResult InvokeUnmarshalled<T0, T1, TResult>(string identifier, T0 arg0, T1 arg1);
+-        TResult InvokeUnmarshalled<T0, TResult>(string identifier, T0 arg0);
++        [ObsoleteAttribute("This method is obsolete. Use JSImportAttribute instead.")]
++        TResult InvokeUnmarshalled<T0, TResult>(string identifier, T0 arg0);
+-        TResult InvokeUnmarshalled<TResult>(string identifier);
++        [ObsoleteAttribute("This method is obsolete. Use JSImportAttribute instead.")]
++        TResult InvokeUnmarshalled<TResult>(string identifier);
+     }
+ }
+```
+