title: Adding a ComboBox to a DataGridView programmatically
body: <p><a href="https://i.stack.imgur.com/ieUxT.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ieUxT.png" alt="enter image description here"></a></p>
  
  <p>Suppose, I created this DataGridView in design view. </p>
  
  <p>Now, I need to add items to the ComboBox column pro grammatically and show the item with index = 0. </p>
  
  <p>The following code does load a ComboBox.</p>
  
  <pre><code>public partial class Form1 : Form
  {
      public Form1()
      {
          InitializeComponent();
      }
  
      private void Form1_Load(object sender, EventArgs e)
      {
  
          dataGridView1.Rows.Add("1st Col", "2nd Col");
          Column3.Items.Add("AAAA");
          Column3.Items.Add("BBBB");
          Column3.Items.Add("CCCC");
  
      }
  }
  </code></pre>
  
  <p>But, doesn't show 0-th item.</p>