String operation timing : String « Data Type « VB.Net Tutorial

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VB.Net Tutorial » Data Type » String 
2.26.12.String operation timing
Public Class Tester
    Public Shared Sub Main
        Dim content As String = ""
        Dim result As New System.Text.StringBuilder
        Dim counter As Integer
        Dim dateTime1 As Date
        Dim dateTime2 As Date
        Dim dateTime3 As Date
        Dim loopCount As Integer = 15000

        dateTime1 = Now

        For counter = To loopCount
            content &= counter.ToString()
        Next counter
        dateTime2 = Now

        For counter = To loopCount
            result.Append(counter.ToString())
        Next counter
        dateTime3 = Now

        content = String.Format_
           "First loop took {0:G4} ms, the second took {1:G4} ms.", _
           dateTime2.Subtract(dateTime1).TotalMilliseconds, _
           dateTime3.Subtract(dateTime2).TotalMilliseconds)
        Console.WriteLine(content)
    End Sub
End Class
First loop took 1734 ms, the second took 0 ms.
2.26.String
2.26.1.Declare String Variable and assign value
2.26.2.String.Empty
2.26.3.Demonstrating String class constructors
2.26.4.Join string
2.26.5.Copy characters from string1 into character Array
2.26.6.String Length property
2.26.7.Demonstrating method GetHashCode of class String
2.26.8.Insert sub string by index
2.26.9.Insert method returns the resulting string
2.26.10.SubString
2.26.11.Get string morse code
2.26.12.String operation timing
2.26.13.Change tab to space
2.26.14.ToString
2.26.15.Catch Exception for String.Substring
2.26.16.Count Vowels
2.26.17.Reverse a string
2.26.18.Make a reference copy
2.26.19.Check a Credit card number
2.26.20.Read String value from Keyboard
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