Looping from a phrase from textbox for number of times entered in textbox

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C#

Visual-Studio

I'm working on an assignment and the application has the user enter a phrase and number into two separate textboxes. This assignment uses c# in visual studio. Then, the phrase should appear in the listbox that number of times entered and each time the phrase appears, it should increase by one.
Example, phrase: Coding is fun.
Example number: 3
So the listbox would show
1. Coding is fun
2. Coding is fun
3. Coding is fun

Right now, nothing shows up in the listbox

What I have tried:

Here's the coding I have so far

string strPhrase = txtPhrase.Text;
double dblReptitions;
int intCounter = 1;



if (double.TryParse(txtReptitions.Text, out dblReptitions))
{
for (intCounter = 1; intCounter == dblReptitions; intCounter ++)
{

lstPhrase.Items.Add(strPhrase);

}