C# - .NET 5+에서 warning CA1416: This call site is reachable on all platforms. '...' is only supported on: 'windows' 경고 발생

.NET 6에서 Windows Forms 프로젝트를 생성 후 다음과 같은 식으로 코딩을 하면,

// C# - OpenCvSharp.VideoWriter에 BMP 파일을 1초씩 출력하는 예제
// ; https://www.sysnet.pe.kr/2/0/12485
private static byte[] GetBitmapData(Bitmap frameBitmap)
{
    var bitmapData = frameBitmap.LockBits(new System.Drawing.Rectangle(System.Drawing.Point.Empty, frameBitmap.Size),
        ImageLockMode.ReadOnly,
        PixelFormat.Format24bppRgb);

    try
    {
        var length = bitmapData.Stride * bitmapData.Height;
        var data = new byte[length];
        Marshal.Copy(bitmapData.Scan0, data, 0, length);
        return data;
    }
    finally
    {
        frameBitmap.UnlockBits(bitmapData);
    }
}

1>C:\temp\WindowsFormsApp1\test.cs(91,30,91,47): warning CA1416: This call site is reachable on all platforms. 'BitmapData.Stride' is only supported on: 'windows'.

CA1416: Validate platform compatibility
; https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/quality-rules/ca1416

using System.Runtime.Versioning;

[assembly: SupportedOSPlatform("windows")]