DataGridColumnStyle.GetPreferredHeight Method

public class Form1: Form
{
 protected DataGrid dataGrid1;

private void GetHeight(){
    MyGridColumn myGridColumn;
    // Get a DataGridColumnStyle of a DataGrid control.
    myGridColumn = (MyGridColumn) dataGrid1.TableStyles[0].
    GridColumnStyles["CompanyName"];
    // Create a Graphics object.
    Graphics g = this.CreateGraphics();
    Console.WriteLine(myGridColumn.GetPrefHeight(g, "A string"));
 }
}

public class MyGridColumn:DataGridTextBoxColumn{
   public int GetPrefHeight(Graphics g, string thisString){
      return this.GetPreferredHeight(g,thisString);
   }
}