A nice project, everyone coming from Java and migrating to C#:
IKVM.NET Home Page
It is a JVM implemented in .NET, contains a .NET implementation of a lot classes from the Java class libraries (JDK), compliance of 1.4 almost complete and contains tools for interop between Java and .NET.
As it is one of the FAQs on every Java newsgroup or Java Mailinglists: “How to handle console?”
I came across a nice library that supports console operations on Windows, Linux and Mac OS: JLine.
Check it out, if you really need to work with the console on the mentioned platforms. The libarary works using native features, but I find the handling quite nice: the required DLL for Windows for instance is dynamically extracted from the JAR and loaded, so there is no need for a special installation.
JLine does not provide curses features at the moment, but it is a good approach if you need to read a password from standard in.