Access public partial class variable in another class

Question

I have a class with following structure :-

namespace CL.Forms
{
    public partial class A
    {
        public StringBuilder sb = new StringBuilder();

        sb.Append("a");
        sb.Append("b");
    }

    public class B
    {
        A objA=new A();
        string s= objA.sb.ToString();
    }
}

I want to access the varible in class A from class B . I tried the above method. But it doesn't work. Anyone knows the answer. Please help me.

Answer 1

You need to create a constructor or method

namespace CL.Forms
{
    public partial class A
    {
        public StringBuilder sb = new StringBuilder();

       //Constructor to set default for string builder
        public A()
        {
            sb.Append("a");
            sb.Append("b");
        }
    }

    public class B
    {
        public B()
        {
            A objA=new A();
            string s= objA.sb.ToString();
        }
   }

Answer 2

You need to put your code(s) inside of a method, like constructor:

public partial class A
{
    public StringBuilder sb = new StringBuilder();

    public A()
    {
       sb.Append("a");
       sb.Append("b");
    }
}

public class B
{
    A objA = new A();
    public B() 
    {
        string s = objA.sb.ToString();
    }
}

Answer 3

namespace CL.Forms
{
    public partial class A
    {
        //decalring sb
        public StringBuilder sb = new StringBuilder();
        //giving sb default values incase you dont change it just call the variable but it has
        //but it has to happen in a method
        public A()
        {
            sb.Append("a");
            sb.Append("b");
        }
        // a seperate methode to return sb
        public StringBuilder getSb()
        {
            return sb;
        }
    }
    public static class B
    {
        //same stuff
        A objA = new A();
        public void methodNameHere()
        {
            string s = objA.sb.ToString();
        }
    }
}

try this, you forgot to implement methodes in your classes. that is crucial else it wont work. But maybe it is better if you just google some tutorials for OOP.