EnumerableToDispatchMarshaler.cs

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using System.Collections;
using System.Runtime.Versioning;
 
namespace System.Runtime.InteropServices.CustomMarshalers;
 
[SupportedOSPlatform("windows")]
internal sealed class EnumerableToDispatchMarshaler : ICustomMarshaler
{
    private static readonly EnumerableToDispatchMarshaler s_enumerableToDispatchMarshaler = new EnumerableToDispatchMarshaler();
 
    public static ICustomMarshaler GetInstance(string cookie)
    {
        return s_enumerableToDispatchMarshaler;
    }
 
    private EnumerableToDispatchMarshaler()
    {
    }
 
    public void CleanUpManagedData(object ManagedObj)
    {
    }
 
    public void CleanUpNativeData(IntPtr pNativeData)
    {
        Marshal.Release(pNativeData);
    }
 
    public int GetNativeDataSize()
    {
        return -1;
    }
 
    public IntPtr MarshalManagedToNative(object ManagedObj)
    {
        if (ManagedObj == null)
        {
            throw new ArgumentNullException("ManagedObj");
        }
        return Marshal.GetComInterfaceForObject<object, IEnumerable>(ManagedObj);
    }
 
    public object MarshalNativeToManaged(IntPtr pNativeData)
    {
        if (pNativeData == IntPtr.Zero)
        {
            throw new ArgumentNullException("pNativeData");
        }
        object objectForIUnknown = Marshal.GetObjectForIUnknown(pNativeData);
        return ComDataHelpers.GetOrCreateManagedViewFromComData(objectForIUnknown, (object obj) => new EnumerableViewOfDispatch(obj));
    }
}