C# Generic Method, cannot implicit convert

Question

I\'ve got the following code:

public static T GetCar() where T : ICar
{
    T objCar = default(T);

    if (typeof(T) == typeof(SmallCar)) {
                


        

Answer 1

Your code is illegal because while you might be testing and know that your given T is BigCar or some other such type, the compiler cannot know that in advance and therefore the code is illegal. Based upon your given usage, you could have

public static T GetCar() where T : ICar, new()
{
    return new T();
}

The new() constraint allows you to invoke the default (parameterless) constructor on a type.