title: NotImplementedException thrown when TextBox Constructor is called in my Unity project
body: <p>I have been using the Windows.Forms libraries in my Unity project as a GUI so that the user can export and import paticular files. I have recently had the thought to use it for text input because the ui is sleeker than the Unity text input in doing so I made this snippet of code.</p>
  <p>Code:</p>
  <pre><code>public TextInputDialog()
          {
              form = new Form();
              label = new Label();
              textBox = new TextBox();
              buttonOK = new Button();
              buttonCancel = new Button();
  
              buttonOK.Text = &quot;Save&quot;;
              buttonCancel.Text = &quot;Cancel&quot;;
              buttonOK.DialogResult = DialogResult.OK;
              buttonCancel.DialogResult = DialogResult.Cancel;
  
              label.SetBounds(9, 20, 372, 13);
              textBox.SetBounds(12, 36, 372, 20);
              buttonOK.SetBounds(228, 72, 75, 23);
              buttonCancel.SetBounds(309, 72, 75, 23);
  
              label.AutoSize = true;
              textBox.Anchor = textBox.Anchor | AnchorStyles.Right;
              buttonOK.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
              buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
  
              form.ClientSize = new Size(396, 107);
              form.Controls.AddRange(new Control[] { label, textBox, buttonOK, buttonCancel });
              form.ClientSize = new Size(Math.Max(300, label.Right + 10), form.ClientSize.Height);
              form.FormBorderStyle = FormBorderStyle.FixedDialog;
              form.StartPosition = FormStartPosition.CenterScreen;
              form.MinimizeBox = false;
              form.MaximizeBox = false;
              form.AcceptButton = buttonOK;
              form.CancelButton = buttonCancel;
          }
  </code></pre>
  <p>However when I ran the engine to test the text input window and it resulted in a NotImplementedException that occurs when the TextBox constructor is called and when I try to define a new Control array.</p>
  <p>Log:</p>
  <pre><code>NotImplementedException: The method or operation is not implemented.
  System.Runtime.InteropServices.Marshal.ReadInt16 (System.Object ptr, System.Int32 ofs) (at &lt;437ba245d8404784b9fbab9b439ac908&gt;:0)
  System.Drawing.Font.FromLogFont (System.Object lf, System.IntPtr hdc) (at &lt;bfeb5fdca71942e18134223465f4f838&gt;:0)
  System.Drawing.Font.FromHfont (System.IntPtr hfont) (at &lt;bfeb5fdca71942e18134223465f4f838&gt;:0)
  System.Drawing.SystemFonts.get_DefaultFont () (at &lt;bfeb5fdca71942e18134223465f4f838&gt;:0)
  System.Windows.Forms.Control.get_DefaultFont () (at &lt;7ba8bff9dfdb4207a1717d1c6879c3ed&gt;:0)
  System.Windows.Forms.Control.get_Font () (at &lt;7ba8bff9dfdb4207a1717d1c6879c3ed&gt;:0)
  System.Windows.Forms.Control.get_FontHeight () (at &lt;7ba8bff9dfdb4207a1717d1c6879c3ed&gt;:0)
  System.Windows.Forms.TextBoxBase.get_PreferredHeight () (at &lt;7ba8bff9dfdb4207a1717d1c6879c3ed&gt;:0)
  System.Windows.Forms.TextBoxBase.get_DefaultSize () (at &lt;7ba8bff9dfdb4207a1717d1c6879c3ed&gt;:0)
  System.Windows.Forms.Control..ctor (System.Boolean autoInstallSyncContext) (at &lt;7ba8bff9dfdb4207a1717d1c6879c3ed&gt;:0)
  System.Windows.Forms.Control..ctor () (at &lt;7ba8bff9dfdb4207a1717d1c6879c3ed&gt;:0)
  System.Windows.Forms.TextBoxBase..ctor () (at &lt;7ba8bff9dfdb4207a1717d1c6879c3ed&gt;:0)
  System.Windows.Forms.TextBox..ctor () (at &lt;7ba8bff9dfdb4207a1717d1c6879c3ed&gt;:0)
  (wrapper remoting-invoke-with-check) System.Windows.Forms.TextBox..ctor()
  System.Windows.Forms.TextInputDialog..ctor () (at Assets/Scripts/TextInputDialog.cs:20)
  TileMaker.Start () (at Assets/Scripts/TileMaker.cs:122)
  </code></pre>
  <p>I have been trying to find a solution to this problem, my best guess is that there are missing library dependencies. Without being able to see exactly what in the constructor could throw the exception, I in my limited knowledge fail to reach that solution. Any help or thoughts would be much appreciated.</p>