added orai

20240226/WindowsFormsApp1/Form1.cs

@@ -0,0 +1,53 @@
+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 WindowsFormsApp1
+{
+    public partial class Form1 : Form
+    {
+        public Form1()
+        {
+            InitializeComponent();
+        }
+
+        private void label1_Click(object sender, EventArgs e)
+        {
+
+        }
+
+        private void button1_Click(object sender, EventArgs e)
+        {
+            double r = Convert.ToDouble(textBox1.Text);
+
+            label2.Text = $"A kör kerülete: {2 * r * Math.PI}";
+            label3.Text = $"A kör területe: {r* r * Math.PI}";
+        }
+
+        private void textBox1_TextChanged(object sender, EventArgs e)
+        {
+
+        }
+
+        private void label3_Click(object sender, EventArgs e)
+        {
+
+        }
+
+        private void Form1_Load(object sender, EventArgs e)
+        {
+
+        }
+
+        private void radioButton1_CheckedChanged(object sender, EventArgs e)
+        {
+
+        }
+    }
+}