razor Html.DropdownList provide “Please select” as optionLabel AND “US” as selectedValue

Question

Data:

var countries = new Dictionary();
countries.Add(\"AF\",\"Afghanistan\");
countries.Add(\"US\",\"United States\");
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Answer 1

The answer here: ASP.Net Html.DropDownList Selected Element not Selected could also be the solution.

You use "Countries" for the name of the dropdown and "countries" as the name of the SelectList. Try renaming one or the other to something different.