#nullable enable

using System;

public class C1 {
    string x;
    
    public C1()
    {
        try
        {
            x = "";
        }
        catch (Exception)
        {
            x = "";
        }
    }
}

public class C2 {
    string x;
    
    public C2() // warning CS8618: Non-nullable field 'x' is uninitialized. Consider declaring the field as nullable.
    {
        try
        {
            x = "";
        }
        catch (Exception)
        {
            x ??= "";
        }
    }
}