Output: A string is more than the sum of its chars.īecause a string "modification" is actually a new string creation, you must use caution when you create references to strings. string object and stores it in s1, releasing the String s2 = "than the sum of its chars." That new object is assigned to the variable s1, and the original object that was assigned to s1 is released for garbage collection because no other variable holds a reference to it. The += operator creates a new string that contains the combined contents. In the following example, when the contents of s1 and s2 are concatenated to form a single string, the two original strings are unmodified. All of the String methods and C# operators that appear to modify a string actually return the results in a new string object. String objects are immutable: they can't be changed after they've been created. Use the static IsNullOrEmpty(String) method to verify the value of a string before you try to access it.
By initializing strings with the Empty value instead of null, you can reduce the chances of a NullReferenceException occurring. The string literal representation of a zero-length string is "". Initialize a string with the Empty constant value to create a new String object whose string is of zero length. You don't use the new operator to create a string object except when initializing the string with an array of chars. System.String documentation for details. a string from a char*, char, or sbyte*. Use the String constructor only when creating being used to store another string value.Ĭonst string message4 = "You can't get rid of me!" Use a const string to prevent 'message4' from Var temp = "I'm still a strongly-typed System.String!" String newPath = Files\Microsoft Visual Studio 9.0" Initialize with a verbatim string literal. String oldPath = "c:\\Program Files\\Microsoft Visual Studio 8.0" Initialize with a regular string literal. Use the Empty constant instead of the literal "". You can declare and initialize strings in various ways, as shown in the following example: // Declare without initializing. For more information about the type and its methods, see String. For more information about the keyword, see string. In addition, the C# language overloads some operators to simplify common string operations. The String class provides many methods for safely creating, manipulating, and comparing strings. It's recommended to use the provided alias string as it works even without using System. In C#, the string keyword is an alias for String therefore, String and string are equivalent.
#X WORD THAT DESCRIBES SOMEONE CODE#
To access the individual Unicode code points in a string, use the StringInfo object. The Length property of a string represents the number of Char objects it contains, not the number of Unicode characters.
There's no null-terminating character at the end of a C# string therefore a C# string can contain any number of embedded null characters ('\0'). Internally, the text is stored as a sequential read-only collection of Char objects. A string is an object of type String whose value is text.
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