How to simplify a big if statement in C#?

Current in my code, if statement is too big and many repetitions.

if (!String.Equals(node.Name, "A", StringComparison.OrdinalIgnoreCase)
 && !String.Equals(node.Name, "B", StringComparison.OrdinalIgnoreCase)
 && !String.Equals(node.Name, "C", StringComparison.OrdinalIgnoreCase)
 &&  ... 

I would like to make it concise. But my idea is only to create a function and passing List or Array as param.

List<String> target = new List<String>() { "A", "B", "C" ... };
MultipleStringCompare(node.Name, target, , StringComparison.OrdinalIgnoreCase);

Is there any more beautiful way to make it simple without making any function in modern C# syntax?