Compiler Error CS0266 and InvalidCastException with RequestMessage<T>

[llanecsi]

I am following the example to use a RequestMessage:

// Request the value from another module
User user = WeakReferenceMessenger.Default.Send<LoggedInUserRequestMessage>();

But am getting Compiler Error CS0266 which says there is no implicit conversion from RequestMessage to IMyInterface but an explicit conversion exists, am I missing a cast.

public class MyInterfaceRequestMessage : RequestMessage<IMyInterface>
{
}

IMyInterface myInterface = WeakReferenceMessenger.Default.Send<MyInterfaceRequestMessage>();

So I tried adding an explicit cast:
IMyInterface myInterface = (IMyInterface)WeakReferenceMessenger.Default.Send<MyInterfaceRequestMessage>();

But then at runtime I get an exception:
System.InvalidCastException: 'Unable to cast object of type 'MyInterfaceRequestMessage' to type 'IMyInterface'.'

This is in Visual Studio 2022 (v17.1.0)

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Document Details

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• ID: c7dcc853-0669-abff-dfd4-2f3f846550e6
• Version Independent ID: dda76eac-fef5-01f4-6ddc-e5265c8e9d17
• Content: Messenger - Windows Community Toolkit
• Content Source: docs/mvvm/Messenger.md
• Product: community-toolkit
• GitHub Login: @Sergio0694
• Microsoft Alias: mhawker