Rawhi Rawhi - 13 days ago 5
C# Question

What does "where T : class, new()" mean?

Can you please explain to me what

where T : class, new()
means in the following line of code?

void Add<T>(T item) where T : class, new();

Answer

That is a constraint on the generic parameter T. It must be a class (reference type) and must have a public parameter-less default constructor.

That means T can't be an int, float, double, DateTime or any other struct (value type).

It could be a string, or any other custom reference type, as long as it has an default or parameter-less constructor.