Question

I’m trying to make a method with optional parameter SpriteFont = myFont work. Because spritefont is not a compile time constant, I can’t use it, so I decided to try SpriteFont? = null:

void MyMethod(int x, SpriteFont? font = null)
{
    SpriteFont f;
    if (font == null) f = defaultFont; else f = font; // Cannot convert type 'Microsoft.Xna.Framework.Graphics.SpriteFont?' to 'Microsoft.Xna.Framework.Graphics.SpriteFont'
}

How do I take out my SpriteFont from SpriteFont??

UPD: this may be a problem with types that are not convertible from nullable to base type by default. (SpriteFont)font still causes “cannot convert”.

UPD2: turns out SpriteFont is nullable by default. Still, I now know how to work with nonNullable?.

Answer 1

Nullable can be converted to the non nullable type by these ways:

• (Type)variable;
• variable.Value