why output : Method must have a return type ?

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
class abc
{ private int age;
private string name ;
public Pname(string nm)
{
name = nm;
}
public string getname()
{
return name;
}
}
static void Main (string[] args)
{
abc ab = new abc("asfat");
Console.WriteLine(ab.getname());
}
}
}

Answer 1

Actualy, the problem has nothing to do with the return type.

The main problem is at your Constructor:
public Pname(string nm)
{
name = nm;
}

Constructors must have the same name as their Class so that must be:
public abc(string nm)
{
name = nm;
}
and that will fix it.