What is the syntax for a default constructor for a generic class?

Question

Is it forbidden in C# to implement a default constructor for a generic class?

If not, why the code below does not compile? (When I remove it c

Answer 1

And if you need the Type as a property:

public class Cell
{
    public Cell()
    {
        TheType = typeof(T);
    }

    public Type TheType { get;}
}