I saw the following code in my project.
public virtual Department Department { get; set; } = null!;
I'm not sure what it means about null!. Does it mean null or not null or it's just null for sure or the ! simply ignore the compiler warning? Can anyone explain?
Here is the documentation about the bang operator. TLDR the default value is null and its telling the compiler its okay.
In C#, null means "no object." You cannot use 0 instead of null in your programs even though null is represented by the value 0. You can use null with any reference type including arrays, strings, and custom types. In C#, null is not the same as the constant zero.
The difference between “is not null” and “!= null” is that the compiler guarantees that no user-overloaded operator is called when using “is not null” instead of “!= null” (or “is null” instead of “== null”).
The null-forgiving operator (!) is used to inform the compiler that passing null is expected and shouldn’t be warned about. You can also use the null-forgiving operator when you definitely know that an expression can’t be null but the compiler doesn’t manage to recognize that.
null keyword?". Providing a background of what null is isn't necessary. Comparison to null (is not null vs != null) isn't needed either because the OP incorrectly assumes the ! relates to "not".
c# null!, the first two links I see are: stackoverflow.com/questions/54724304/… and learn.microsoft.com/en-us/dotnet/csharp/language-reference/…