ArrayList.IndexOfの使用方法について

Class TableField

Plivate Field As String
Plivate Text as string

Sub New(ByVal _field As String, ByVal _text As String)

    Me.Field = _field
    Me.Text  = _text

End Sub

End Class

Dim Record As New ArrayList

For i As Integer = 0 To myReader.FieldCount() - 1 
    Record.Add(new TableField(myReader.GetName(i), myReader.GetString(i))
Next

Me.Field.Add(myReader.GetName(i))
Me.Text.Add(myReader.Item(i))

Me.Text.Item(Me.Field.IndexOf("ShopName"))

public class Test
{
  private string value="";
  public string Value
  {
    get
    {
      return this.value;
    }
    set
    {
      this.value = value;
    }
  }

  public Test(){}

  public override bool Equals(object obj)
  {
    Test t = obj as Test;
    if( object.ReferenceEquals(t, null) )return false;
    else return this.value == t.value;
  }
  public override int GetHashCode()
  {
    return value.GetHashCode();
  }

  public static bool operator==(Test a, Test b)
  {
    if( object.ReferenceEquals(a, null) )
    {
      if( object.ReferenceEquals(b, null) )return true;
      else return false;
    }
    else
    {
      if( object.ReferenceEquals(b, null) )return false;
      else return a.value == b.value;
    }
  }
  public static bool operator!=(Test a, Test b)
  {
    return !(a==b);
  }
}

Structure DBField

    Public Field As String
    Public Text As String

End Structure

Dim mydbf as DBField
mydbf.Field = "ShopName"

Record.indexOf(mydbf)

Dim mydbf as DBField
mydbf.Field = "ShopName"
mydbf.Text = "7-11"

Record.indexOf(mydbf)

Structure DBField

    Public Field As String
    Public Text As String

    Overrides Function toString() As String

        Return Me.Field

    End Function

End Structure