public static bool UniformDataType(Grasshopper.Kernel.Data.GH_Structure<Grasshopper.Kernel.Types.IGH_Goo> tree, ref String UniformType)
{
if (tree.get_FirstItem(true) == null) return false;
Type t = tree.get_FirstItem(true).GetType();
foreach (IGH_Goo obj in tree.AllData(false)) {
if (obj == null) return false;
if (obj.GetType() != t) return false;
}
UniformType = TypeToString(tree.get_FirstItem(true));
return true;
}