The default for KeyValuePair

Question

I have an object of the type IEnumerable> keyValueList, I am using

 var getResult= keyValueList.SingleOrDefault()         


        

Answer 1

I recommend more understanding way using extension method:

public static class KeyValuePairExtensions
{
    public static bool IsNull(this KeyValuePair pair)
    {
        return pair.Equals(new KeyValuePair());
    }
}

And then just use:

var countries = new Dictionary
{
    {"cz", "prague"},
    {"de", "berlin"}
};

var country = countries.FirstOrDefault(x => x.Key == "en");

if(country.IsNull()){

}