Masked Input

MaskedInputLineReader reads sensitive console input with * masking. The cursor must be at column 0 when ReadMaskedInput is called, or it throws InvalidOperationException. Write your prompt with a trailing newline (e.g. Console.WriteLine) so the cursor lands at column 0.

Input can span multiple terminal rows and is capped at 65,536 characters (64K); past that, ReadMaskedInput throws InvalidOperationException.

The reader holds no console state at construction and resets on each call, so a single instance can be reused for multiple reads (e.g. a password-retry loop).

cmdDef.Handler = (cmd) =>
{
    Console.WriteLine("Enter password:");
    var reader = new MaskedInputLineReader();
    string password = reader.ReadMaskedInput();
    if (password is null)
        return; // cancelled: Escape or console resize
        
    // use password...
};