Copy class to other class

You can write implicit conversion operator and use it for converting instances of the classes (but not copying in term of exact copy). You cannot use ClassB=ClassA because they are classes. But if you have something like this

ClassA a = new ClassA();
ClassB b = new ClassB();

You can use b = a; as conversion if you have defined implicit conversion operator. Inside the conversion operator you can write your copy logic.


See this:
Using Conversion Operators (C# Programming Guide)[^]

using Reflection:

using System;
using System.Reflection;



class Test
{
    public static void Main()
    { 

        ClassA objClassA = new ClassA();
        objClassA.ID = 1;
        objClassA.Name = "NameValue";

        ClassB objClassB = new ClassB();
        CopyProperties(objClassA, objClassB);

        int id = objClassB.ID; // 1
        string name = objClassB.Name; // NameValue
         

    }

    private static void CopyProperties(object objectA, object objectB)
    {
        if (objectA == null || objectB == null) throw new ArgumentNullException();

        var props = objectA.GetType().GetProperties();
        foreach (PropertyInfo pi in props)
        {
            object value = pi.GetValue(objectA, null);
            var prop = objectB.GetType().GetProperty(pi.Name);
            if (prop != null)
                prop.SetValue(objectB, value, null);
        }
    }

}

class ClassA  
{
    public int ID { get; set; }
    public string Name { get; set; }
}

class ClassB  
{
    public int ID { get; set; }
    public string Name { get; set; }
}