How to mute the CS8602 warning if it's checked with the is-Operator before in C#-CodePudding

I do my best to check null values. But often, I try this with the is-Operator. While this, I expect, he will give true back only, if operand is a not-null value.

Example:

EndPoint endPoint = new();

if (endPoint is IPEndPoint)
    DoSomething(endPoint as IPEndPoint); // The "as" expressions give the CS8602 warning

...

void DoSomething(IPEndPoint endPoint)
{
    ...
}

With this, I get a CS8602 compiler warning, but endPoint is a IPEndPoint and the as expression can't be null. So IMHO, the compiler warning is wrong. How can I mute it for before checks with the is-Operator only?

(Maybe inside the .editorconfig anyhow?)

CodePudding user response：

is and as are two separate casting operations and the compiler tries to cast and validate both of them, so it's reasonable to say warning CS8602.

As @Adassko said in the comment the best way is to cast the object once and use the casting result (if castable):

EndPoint endPoint = new();

if (endPoint is IPEndPoint endpoint)
    DoSomething(endpoint);