private void pictureBox1_DragEnter(object sender, DragEventArgs e)
{
TreeNode node = e.Data.GetData(typeof(TreeNode)) as TreeNode;
if (!AllowUpdateImage || node == null)
{
e.Effect = DragDropEffects.None;
}
else if (node.Tag is InventorySnapshot || node.Tag is InventoryTexture)
{
e.Effect = DragDropEffects.Copy | DragDropEffects.Move;
}
else
{
e.Effect = DragDropEffects.None;
}
}