Question

Maybe I am missing something entirely simple here, but in any new windows form I create, I can no longer use the Convert method. I am pretty sure all my using directives are there and I am using no extensions. I have done nothing to change VS since the last time I used it, when everything worked.

Could it be a hiccup of VS 2011 Beta or just a simple error on my part?

Here is my code along with the error displayed:

‘System.Windows.Forms.Button’ does not contain a definition for
‘ToInt32’

and no extension method ‘ToInt32’ accepting a first argument of type

‘System.Windows.Forms.Button’ could be found

(are you missing a using directive or an assembly reference?)

Here’s the code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace TempConvert
{
    public partial class Form1 : Form
    {
        int degreesEntered;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
        }

        private void Convert_Click(object sender, EventArgs e)
        {
            degreesEntered = Convert.ToInt32(Degrees.Text);
        }
    }
}

Answer 1

I believe the problem is you have a button named Convert which is hiding the static class – you can try using the full namespace to reference it, or doing an int.Parse

System.Convert.ToInt32(Degrees.Text);