First, I don't understand why you are adding all the keys and values count times, Index is never used.
I tried this example :
var source = new BindingSource();
List<MyStruct> list = new List<MyStruct> { new MyStruct("fff", "b"), new MyStruct("c","d") };
source.DataSource = list;
grid.DataSource = source;
and that work pretty well, I get two columns with the correct names. MyStruct type exposes properties that the binding mechanism can use.
class MyStruct
{
public string Name { get; set; }
public string Adres { get; set; }
public MyStruct(string name, string adress)
{
Name = name;
Adres = adress;
}
}
Try to build a type that takes one key and value, and add it one by one. Hope this helps.