Drag Gmail attachment to c# winform

i'm trying to have may application accept attachments dragged in from the Gmail web page.

But when i drag in a attachment , directly from the site e.Data does nor seem to contain the data in any way.

    private void Form1_DragDrop(object sender, DragEventArgs e)
    {
        string[] dataFormats = e.Data.GetFormats();
        Type type = e.Data.GetType();
    }

e.Data is of type DataObject. FileDrop, FileNameW, FileName are null DragContext, DragImageBits, chromium/x-renderer-taint are System.IO.MemoryStream

Non of the Memorystream objects hold any file data of the attachment dragged in. Nor any download url.

edit. Apparently when dragging in a picture attachment, the data is holding the URL. but other attachments, does not carry a URL but some way windows explorer knows where to download it when i drag it to desktop, so there must be a way to retrieve this URL.

edit2 added data viewed with Immediate Window for DataObject

    (e.Data as System.Windows.DataObject).GetFormats(false);
{string[4]}
    [0]: "DragContext"
    [1]: "DragImageBits"
    [2]: "chromium/x-renderer-taint"
    [3]: "FileDrop"
(e.Data as System.Windows.DataObject).GetData("DragContext");
'(e.Data as System.Windows.DataObject).GetData("DragContext")' threw an exception of type 'System.Runtime.InteropServices.COMException'
    Data: {System.Collections.ListDictionaryInternal}
    ErrorCode: -2147221404
    HResult: -2147221404
    HelpLink: null
    InnerException: null
    Message: "Invalid FORMATETC structure (Exception from HRESULT: 0x80040064 (DV_E_FORMATETC))"
    Source: "System"
    StackTrace: "   at System.Runtime.InteropServices.ComTypes.IDataObject.GetData(FORMATETC& format, STGMEDIUM& medium)\r\n   at System.Windows.DataObject.OleConverter.GetDataInner(FORMATETC& formatetc, STGMEDIUM& medium)\r\n   at System.Windows.DataObject.OleConverter.GetDataFromOleHGLOBAL(String format, DVASPECT aspect, Int32 index)\r\n   at System.Windows.DataObject.OleConverter.GetDataFromBoundOleDataObject(String format, DVASPECT aspect, Int32 index)\r\n   at System.Windows.DataObject.OleConverter.GetData(String format, Boolean autoConvert, DVASPECT aspect, Int32 index)\r\n   at System.Windows.DataObject.OleConverter.GetData(String format, Boolean autoConvert)\r\n   at System.Windows.DataObject.GetData(String format, Boolean autoConvert)\r\n   at System.Windows.DataObject.GetData(String format)"
    TargetSite: {Void GetData(System.Runtime.InteropServices.ComTypes.FORMATETC ByRef, System.Runtime.InteropServices.ComTypes.STGMEDIUM ByRef)}
(e.Data as System.Windows.DataObject).GetData("DragImageBits");
{System.IO.MemoryStream}
    CanRead: true
    CanSeek: true
    CanTimeout: false
    CanWrite: true
    Capacity: 87144
    Length: 87144
    Position: 0
    ReadTimeout: '((System.IO.Stream)(e.Data as System.Windows.DataObject).GetData("DragImageBits")).ReadTimeout' threw an exception of type 'System.InvalidOperationException'
    WriteTimeout: '((System.IO.Stream)(e.Data as System.Windows.DataObject).GetData("DragImageBits")).WriteTimeout' threw an exception of type 'System.InvalidOperationException'
(e.Data as System.Windows.DataObject).GetData("chromium/x-renderer-taint");
{System.IO.MemoryStream}
    CanRead: true
    CanSeek: true
    CanTimeout: false
    CanWrite: true
    Capacity: 1
    Length: 1
    Position: 0
    ReadTimeout: '((System.IO.Stream)(e.Data as System.Windows.DataObject).GetData("chromium/x-renderer-taint")).ReadTimeout' threw an exception of type 'System.InvalidOperationException'
    WriteTimeout: '((System.IO.Stream)(e.Data as System.Windows.DataObject).GetData("chromium/x-renderer-taint")).WriteTimeout' threw an exception of type 'System.InvalidOperationException'
(e.Data as System.Windows.DataObject).GetData("FileDrop");
'(e.Data as System.Windows.DataObject).GetData("FileDrop")' threw an exception of type 'System.Runtime.InteropServices.COMException'
    Data: {System.Collections.ListDictionaryInternal}
    ErrorCode: -2147221404
    HResult: -2147221404
    HelpLink: null
    InnerException: null
    Message: "Invalid FORMATETC structure (Exception from HRESULT: 0x80040064 (DV_E_FORMATETC))"
    Source: "System"
    StackTrace: "   at System.Runtime.InteropServices.ComTypes.IDataObject.GetData(FORMATETC& format, STGMEDIUM& medium)\r\n   at System.Windows.DataObject.OleConverter.GetDataInner(FORMATETC& formatetc, STGMEDIUM& medium)\r\n   at System.Windows.DataObject.OleConverter.GetDataFromOleHGLOBAL(String format, DVASPECT aspect, Int32 index)\r\n   at System.Windows.DataObject.OleConverter.GetDataFromBoundOleDataObject(String format, DVASPECT aspect, Int32 index)\r\n   at System.Windows.DataObject.OleConverter.GetData(String format, Boolean autoConvert, DVASPECT aspect, Int32 index)\r\n   at System.Windows.DataObject.OleConverter.GetData(String format, Boolean autoConvert)\r\n   at System.Windows.DataObject.GetData(String format, Boolean autoConvert)\r\n   at System.Windows.DataObject.GetData(String format)"
    TargetSite: {Void GetData(System.Runtime.InteropServices.ComTypes.FORMATETC ByRef, System.Runtime.InteropServices.ComTypes.STGMEDIUM ByRef)}

The attachment is detected as a FileDrop, the data contains the URL to the attachment, which can be retrieved by doing GetData(DataFormats.Text).

Here is some sample code for you to try:

private void Form1_DragDrop(object sender, DragEventArgs e) {
    string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
    if (files == null) {
        string url = (string)e.Data.GetData(DataFormats.Text);
        MessageBox.Show(url);
   }
}

private void Form1_DragEnter(object sender, DragEventArgs e) {
    if (e.Data.GetDataPresent(DataFormats.FileDrop)) {
        e.Effect = DragDropEffects.Copy;
    }
}

Note that it is important to handle the DragEnter event and set the e.Effect to DragDropEffects.Copy, otherwise the DragDrop event either won't fire, or won't have the data you need.