The generated Marshaller has mistaken namespace

[wherewhere]

Actual behavior

When CsWin32RunAsBuildTask is true, the generated Marshaller has mistaken namespace:

[DebuggerDisplay("{Value}"),NativeMarshalling(typeof(global::Java..InteropServices.JBooleanMarshaller))]
[global::System.CodeDom.Compiler.GeneratedCode("Microsoft.Windows.CsWin32", "0.3.269+368685089b.RR")]
internal readonly partial struct JBoolean : IEquatable<JBoolean>;

namespace .InteropServices
{
    [global::System.Runtime.InteropServices.Marshalling.CustomMarshaller(typeof(Java.JBoolean),global::System.Runtime.InteropServices.Marshalling.MarshalMode.Default,typeof(JBooleanMarshaller))]
    internal static class JBooleanMarshaller;
}

Expected behavior

The .InteropServices should be InteropServices.

Repro steps

I don't know what happened here. Maybe it is because the root namespace only has one depth. Something like ${sub}.InteropServices become the .InteropServices.

Context

• CsWin32 version: 0.3.269
• Target Framework: net10.0-windows
• LangVersion (if explicitly set by project): latest

[wherewhere]

Maybe is wrong here:

CsWin32/src/Microsoft.Windows.CsWin32/Generator.CustomMarshaller.cs

Lines 25 to 26 in 5792759

	// Custom marshallers should go in a InteropServices sub-namespace.
	shortNamespace += ".InteropServices";