A neater way of handling bools in C#

Question

Working with nullable bools in C# I find myself writing this pattern a lot

if(model.some_value == null || model.some_value == false)
{
    // do things if some_value is not true
}

Is there a more compact way to express this statement? I can't use non-nullable bools because I can't change the model, and I can't do this

if(model.some_value != true)
{
    // do things if some_value is not true
}

Because this will throw a null reference exception if model.some_value is null

One idea I had: I could write an extension method for bools like String.IsNullOrEmpty - bool.IsNullOrFalse. This would be neat enough but I'm wondering if there's some more obvious way of doing this already?

Answer 1

Use a null-coalescing operator to handle cases where the value is null.

if(model.some_value ?? false != true)
{
    // do things if some_value is not true
}

From msdn:

?? Operator (C# Reference)

The ?? operator is called the null-coalescing operator. It returns the left-hand operand if the operand is not null; otherwise it returns the right hand operand.

https://msdn.microsoft.com/en-us/library/ms173224.aspx

Alternatively, a switch would do it.

switch(model.some_value)
{
    case false:
    case null:
    // do things if some_value is not true
    break;
}