Extension for expression (List == null || List.Count > 0)

How many times in the time of coding you had to write an expression as:

List<T> list = new List<T>();

//...

if (list == null || list.Count  == 0)

{

// ...

}

I offering elegant and short solution with the assistance of extension with same name like string.You can use it not only in List but in everyone that inherits from IEnumarable<>:Add next extension(or class) to your project:

public static class Extensions

{

    public static bool IsNullOrDefault<T>(this IEnumerable<T> value)

    {

        return (value == null || value.Count() == default(int));

    }

}

Using:

List<string> list =  new List<string>();

bool isTrue = list.IsNullOrDefault();

list.Add("abc");

bool isFalse = list.IsNullOrDefault();

int[] numbers = null;

isTrue = numbers.IsNullOrDefault();

numbers = new int[] {1};

isFalse = numbers.IsNullOrDefault();

Enjoy!