Why is List not thread-safe?

Question

From the following site:

http://crfdesign.net/programming/top-10-differences-between-java-and-c

Unfortunately, List<> is no

Answer 1

For true thread safety, List<> and other collection types would need to be immutable. With the parallel extensions to .NET coming out in .NET 4.0 we'll be seeing thread safe versions of the most commonly used collections. Jon Skeet touches on some of this.