c# binding IDictionary with Listbox

Question

I am new to windows form and learning. I have a simple code with a form populated with listbox1. I am trying to populate it by binding it to IDictionary instance.

static IDictionary<string, string> Bind_Data = new Dictionary<string, string>();

    Binding myBinding = new Binding("DataSource", Bind_Data, "Key");   

    listBox1.DataBindings.Add(myBinding);

I am getting the following error when I run this code.

error: System.Reflection.TargetInvocationException: Property accessor 'Key' on object 'System.Collections.Generic.Dictionary`2[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]' threw the following exception:'Object does not match target type.' ---> System.Reflection.TargetException: Object does not match target type. at System.Reflection.RuntimeMethodInfo.CheckConsistency(Object target)

Really appreciate if someone can help me understand this error.

I can use

listBox1.DataSource=new Binding(Bind_Data, null);
listBox1.ValueMemeber="Key";
listBox1.DisplayMember="Value";

But I want to use Binding

Answer 1

Looking at the MSDN docs for that constructor: https://docs.microsoft.com/en-us/dotnet/api/system.windows.forms.binding.-ctor?view=netframework-4.7.2#System_Windows_Forms_Binding__ctor_System_String_System_Object_System_String_

The data source argument can only be certain objects - the Dictionary type doesn't implement IList, which I suspect is the reason you are getting the above exception.

If your underlying type must be a Dictionary, you may want to wrap it in a custom class which implements IList so that you get your desired binding, otherwise just use the second style you have above