❔ Form goes fully transparent please help

c#
using System;
using System.Drawing;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Drawing.Text;

namespace HUB
{
    public partial class Menu : Form
    {
        public Menu()
        {
            this.EnableBlur();
            BackColor = Color.Azure;
            TransparencyKey = Color.Azure;
            InitializeComponent();
            guna2ShadowForm1.SetShadowForm(this);
        }
    }




    public static class WindowExtension
    {
        [DllImport("user32.dll")]
        static internal extern int SetWindowCompositionAttribute(IntPtr hwnd, ref WindowCompositionAttributeData data);

        public static void EnableBlur(this Form @this)
        {
            var accent = new AccentPolicy();
            accent.AccentState = AccentState.ACCENT_ENABLE_BLURBEHIND;
            var accentStructSize = Marshal.SizeOf(accent);
            var accentPtr = Marshal.AllocHGlobal(accentStructSize);
            Marshal.StructureToPtr(accent, accentPtr, false);
            var Data = new WindowCompositionAttributeData();
            Data.Attribute = WindowCompositionAttribute.WCA_ACCENT_POLICY;
            Data.SizeOfData = accentStructSize;
            Data.Data = accentPtr;
            SetWindowCompositionAttribute(@this.Handle, ref Data);
            Marshal.FreeHGlobal(accentPtr);
        }
    
    }
    enum AccentState
    {
        ACCENT_ENABLE_BLURBEHIND = 3
    }

    struct AccentPolicy
    {
        public AccentState AccentState;
        public int AccentFlags;
        public int GradientColor;
        public int AnimationId;
    }

    struct WindowCompositionAttributeData
    {
        public WindowCompositionAttribute Attribute;
        public IntPtr Data;
        public int SizeOfData;
    }

    enum WindowCompositionAttribute
    {
        WCA_ACCENT_POLICY = 19
    }
}

c#
using System;
using System.Drawing;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Drawing.Text;

namespace HUB
{
    public partial class Menu : Form
    {
        public Menu()
        {
            this.EnableBlur();
            BackColor = Color.Azure;
            TransparencyKey = Color.Azure;
            InitializeComponent();
            guna2ShadowForm1.SetShadowForm(this);
        }
    }




    public static class WindowExtension
    {
        [DllImport("user32.dll")]
        static internal extern int SetWindowCompositionAttribute(IntPtr hwnd, ref WindowCompositionAttributeData data);

        public static void EnableBlur(this Form @this)
        {
            var accent = new AccentPolicy();
            accent.AccentState = AccentState.ACCENT_ENABLE_BLURBEHIND;
            var accentStructSize = Marshal.SizeOf(accent);
            var accentPtr = Marshal.AllocHGlobal(accentStructSize);
            Marshal.StructureToPtr(accent, accentPtr, false);
            var Data = new WindowCompositionAttributeData();
            Data.Attribute = WindowCompositionAttribute.WCA_ACCENT_POLICY;
            Data.SizeOfData = accentStructSize;
            Data.Data = accentPtr;
            SetWindowCompositionAttribute(@this.Handle, ref Data);
            Marshal.FreeHGlobal(accentPtr);
        }
    
    }
    enum AccentState
    {
        ACCENT_ENABLE_BLURBEHIND = 3
    }

    struct AccentPolicy
    {
        public AccentState AccentState;
        public int AccentFlags;
        public int GradientColor;
        public int AnimationId;
    }

    struct WindowCompositionAttributeData
    {
        public WindowCompositionAttribute Attribute;
        public IntPtr Data;
        public int SizeOfData;
    }

    enum WindowCompositionAttribute
    {
        WCA_ACCENT_POLICY = 19
    }
}