Lists getting cleared unexpectedly after assignment [duplicate]

Answer 1

 if (a is System.ValueType)
 {
   //never
    Console.WriteLine("List is value type");
 }
 if ('s' is System.ValueType)
 {
     //always
     Console.WriteLine("char is value type");
 }

I think you know, char is value type, but list is reference type.

Even code like this; it would be same.

List a = new List();
a.Add('s');
List c = a;
a.Clear();
Console.WriteLine(c.Count);