Use String.Format

Aug 03, 2020
2 minutes to read

Purpose

Converts a composed string expression into a single String.Format call. The use of formatted strings increases code readability and allows you to customize value formatting.

Availability

Available when the caret is on a composed string expression or interpolated string.

Usage

Place the caret on a composed string expression.
Press the Ctrl + . or Ctrl + ~ shortcut to invoke the Code Actions menu.
Select Use String.Format from the menu.

After execution, the Refactoring replaces the composed string with the String.Format method call.

C#
VB.NET

csharp

for (int i = 2; i < 10; i++) {
    for (int j = i; j < 10; j++) {
        Console.WriteLine(String.Format("{0} * {1} = {2}", i, j, i * j));
    }
}

For i As Integer = 2 To 9
    For j As Integer = i To 9
        Console.WriteLine(String.Format("{0} * {1} = {2}", i, j, i * j))
    Next j
Next i