An object-oriented programming language developed by Microsoft that can be used in .NET.
A fuller example.
Public Class Form1
Private runTime As Stopwatch = Stopwatch.StartNew
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
'show run time
' Standard TimeSpan format strings
' https://learn.microsoft.com/en-us/dotnet/standard/base-types/standard-timespan-format-strings
'Label1.Text = runTime.Elapsed.ToString("c")
' Custom TimeSpan format strings
' https://learn.microsoft.com/en-us/dotnet/standard/base-types/custom-timespan-format-strings
' days hours minutes seconds milliseconds
Label1.Text = runTime.Elapsed.ToString("d\.hh\:mm\:ss\.fff")
End Sub
End Class