But the example given below shows how you can create your own custom IndexOf function. For example, by default StringBuilder does not provide the IndexOf member function, which does a linear search for a character in a string. You can use the String and StringBuilder classes whenever required and also write auxilliary functions for both classes by providing static helper functions. The value of MyStrBuilder is I like Soccer.

You can use the StringBuilder class and its Append method to do the same thing:ĭim MyStrBuilder As New StringBuilder ( 'I like ' ) Here is the traditional way using the System.String class:ĭim strConcat As String = String. Let's say you want to concatenate two strings. You can avoid creating a new instance of a string by using the StringBuilder class. Creating many String objects might degrade the performance of your program. NET Framework automatically handles these operations behind the scenes for you.įor example, whenever you modify a string in the String class, the methods of the String class returns a new string as the result. The framework also provides you faster access to string literal values stored in variables.

NET Framework's internal string table will save space in memory for duplicate strings. However, if your methods do not change the string value much, registering the String class to the. If you modify the string frequently-in operations like reassigning, appending, removing, and replacing some characters-you should choose the StringBuilder class. Deciding which to use depends on the frequency of the string modification. You can use either String or StringBuilder for string operations. Private Shared Sub Main( ByVal args As String ())ĭim MyOtherName As New StringBuilder ( 'Hello' ) Example given below illustrates how to manipulate characters with the StringBuilder class and then place the characters into a String object.Įxample of StringBuilder Class Manipulation

Because the String class is immutable, its indexer is read-only, but the StringBuilder indexer is readable/writeable. When you're done manipulating the characters, use StringBuilder's ToString method to extract the finished string from it.īoth String and StringBuilder contain Unicode characters of type Char and support an indexer that returns Char. This buffer can be manipulated in place without creating a new string: You can insert, append, remove, and replace characters. It contains a buffer, typically initialized with a string but usually larger than that string. A StringBuilder object is not a string but rather an auxiliary object used for manipulating characters.

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