C# : 'is' keyword and checking for Not

Question

This is a silly question, but you can use this code to check if something is a particular type...

if (child is IContainer) { //....

Is ther

Answer 1

This hasn't been mentioned yet. It works and I think it looks better than using !(child is IContainer)

if (part is IContainer is false)
{
    return;
}

New In C# 9.0

https://devblogs.microsoft.com/dotnet/welcome-to-c-9-0/#logical-patterns

if (part is not IContainer)
{
    return;
}