Write an app called Triangles that displays the following patterns separately, one below the other. Use

a WINDOWS FORM APP in Visual Studio to implement this app. The program should ask user to enter a number in a

textbox, which is the maximum number of asterisks in a row and the number of row to be displayed. Use

for loops to generate these patterns. All asterisks $(*)$ should be displayed by the Text property of a label;

which causes the asterisks to display side by side. Set Courier New as the font for the Text property of

labels which display the patterns.

The number entered in the textbox cannot be greater than $15.$ This is for controlling the size of the form.

If user enters a wrong number, it should display an error message $$The number entered is not correct.

Enter a number less than or equal to $15.$ Clear the error when user enters a correct number and clicks

a pattern. $[$Hint: The last two patterns require that each line begin with an appropriate number of blank

spaces.$]$