title: Property is inaccessible due to its protection level
body: <p>I need to post to the multiline <code>TextBox</code>. The data is coming from a different method in a separate class.</p>
  
  <pre><code>class converter
  {
      public static void convert(object source, FileSystemEventArgs f)
      {
          //... some job done now post this data to winforms
          Form1.textBox1 = "File Copied" + "  " + 
                           DateTime.Now.ToString("HH:mm:ss tt") +
                           Environment.NewLine;
      }
  }
  </code></pre>
  
  <p>I'm not able to access <code>textBox1</code> from this class. It says: </p>
  
  <blockquote>
    <p>Form1.textBox1' is inaccessible due to its protection level<br>
    An object reference is required for the non-static field, method, or property Form1.textBox1' </p>
  </blockquote>