why i am still getting this warning while i am using set accessor ?

The warning you’re seeing is because the _name field in your Student class is non-nullable, but it’s not being initialized to a non-null value in the constructor. In C#, if you declare a non-nullable reference type, you must initialize it to a non-null value either at the point of declaration or in the constructor.

In your case, you’re setting _name in the Name property setter, but there’s no guarantee that this setter will be called before you try to access _name. This could potentially lead to a NullReferenceException.

To fix this, you can initialize _name to a default value at the point of declaration:

private string _name = "No Name";

 

Or, you could make _name nullable:

 

private string? _name;

 

This tells the compiler that _name is allowed to be null.

Also, there’s a small issue in your Name property setter. If value is not null or empty, _name will not be set. Here’s the corrected version:

 

public string Name
{
    set
    {
        if (string.IsNullOrEmpty(value))
        {
            _name = "No Name";
        }
        else
        {
            _name = value;
        }
    }
    get
    {
        return _name;
    }
}

 

This will set _name to value if value is not null or empty, and to "No Name" otherwise. This ensures that _name always has a non-null value after the setter is called.

Thanks