public struct rep_fields
{
	public float  f_Width;
	public string f_Name;
	public string f_Text;
}

public struct rep_fields
{
	public float  f_Width;
	public string f_Name;
	public string f_Text;
  public rep_fields(float width, string name, string text)
  {
    f_Width = width;
    f_name = name;
    f_text = text;
  }
}

...
   
  public const rep_fields fld = new rep_fields(10.0, "kuku", "kuku");
  public const rep_fields[] flds = new rep_fields[] {new rep_fields(10.0, "kuku", "kuku"), .... }