C#-APP: Displaying TAB in a combo box

[ypytt]

Hi all,
I'm using C#. I have a DataGridView with a ComboBoxColumn. I'm filling the combo box Items collection programatically , because it is different for each row.
Each string in the Items list consists of two other strings, read from a table. I want to format the string, so that the list of items appears as if it has two columns.

When I try the folowing:

((DataGridViewComboBoxCell)this.dgvModules.Rows[i].Cells[0]).Items.Add(this.m_tableProducts.Rows[j]["Model"].ToString() + "\t" +       this.m_tableProducts.Rows[j]["Name"].ToString());

a strange symbol like a rectangle appears instead of the tab.

When I try to simply press tab whithin the "", like this:

((DataGridViewComboBoxCell)this.dgvModules.Rows[i].Cells[0]).Items.Add(this.m_tableProducts.Rows[j]["Model"].ToString() + "   " +       this.m_tableProducts.Rows[j]["Name"].ToString());

the items does not appear in two columns.

What can I do?

I'm sorry if something is not clear, but English is not my first language.

[kenobewan]

There is a problem with \ & / in c#. Either try "\\t" or @"\t". HTH.

[ypytt]

This simply displays \t in my string.

Maybe I wasn't clear enough. I have two string columns. The first one is with fixed length: 40 characters. I want to construct a third columns containing the two strings separated by some space.
But when I simply add 4 or 5 empty spaces between the two strings, it does'n look good. It is because the different characters in the font I am using have different width (e.g. A and a). Because of that, the first string have a different width on each row, no matter that it is always 40 characters.
When I use the tab button in a word-processing program (e.g. Word), the empty space on each row is different, depending on the width of the first string and the text appears as if it is ordered in 2 columns. I want to do something similar in my application.
I cannot use fixed width font (e.g. Courier), because of user requirements.