.Net Windows forms ComboBox Accessibility Issue

Hi ,

We are using .net winforms application(C#). 

Screen reader(NVDA) is unable to read combobox items in the below scenario.

Scenatio 1 : Focus to the combobox and use Alt+Up/Down keys->Combobox items open -> current selected item is Item 2-> enter Esc/Enter key-> item2 was selected in combobox

Then use UP/Down keys->Items are changing from combox box but screen reader is not reading.

ComboBox Properties -> DropDownStyle = ComboBoxStyle.DropDownList

Scenario 2 : Change the DropDownStyle =ComboBoxStyle.DropDown then its reading properly but some small issues are observed.

1) Initial selection its reading like 

[combo box  collapsed
edit
selected Item 1]

we don't want edit.

This is because combobox in edit mode.

Can you please suggest the solution?