gistfile1.cs

Func<String, String> x = name => {
    var buf = new StringBuilder();
    for (var i = 0; i < name.Length; ++i) {
      var prev = i == 0 ? '\0' : name[i - 1];
      var curr = name[i];
      var next = i == name.Length - 1 ? '\0' : name[i + 1];
      if (Char.IsLower(prev) && Char.IsUpper(curr) && !Char.IsUpper(next)) {
        buf.Append("-");
        buf.Append(Char.ToLower(curr));
      } else {
        buf.Append(curr);
      }
    }

    return buf.ToString();
};

x("test").Dump(); // prints "test"
x("compileTest").Dump(); // prints "compile-test"