C# Generic Collection - List<object> vs List<string>

[Bupjae Lee]

            List<string> list1 = new List<string>();
            List<object> list2 = new List<object>();
 
            list2.AddRange(list1);

In C#, Above code is producing compile error:

Argument '1': cannot convert from 'System.Collections.Generic.List<string>' to 'System.Collections.Generic.IEnumerable<object>'

In java, similar code is compiled without error

List<String> list1=new ArrayList<String>();
List<Object> list2=new ArrayList<Object>();
 
list2.addAll(list1);

Am I doing something wrong with C# generic collections?