Question

Get error ‘ClassLibrary3.Class1.a’ is a ‘property’ but is used like a ‘type’ when i want to access the property of base class.

 namespace ClassLibrary3
    {
        public class Class1
        {
            public int a { get; set; }
            public int A { get; set; }
        }

    public class test : Class1
    {
        a=1; // error 'ClassLibrary3.Class1.a' is a 'property' but is used like a 'type'
        public void hello()
        {
            a = 10;
        }
    }
}

Answer 1

Yes; that is normal. With the exception of field initializers, the code must be in a method. That isn’t a field initializer.

Either assign a=1; in the derived constructor, or create an overloaded constructor and pass 1 to the base type’s constructor.

So either:

public test() {
    a = 1;
}

Or:

protected Class1(int a) {
    this.a = a;
}
...
public test() : base(1)
{}