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String.Copy Method

Creates a new instance of String with the same value as a specified String.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public static string Copy(
	string str


Type: System.String
The string to copy.

Return Value

Type: System.String
A new string with the same value as str.


str is null.

The following example displays two disimilar strings referenced by two variables, creates a copy of the first string, assigns a reference to the new string to the second variable, then displays the two strings referenced by the variables to demonstrate that the strings are now identical.

// Sample for String.Copy()
using System;

class Sample {
    public static void Main() {
    string str1 = "abc";
    string str2 = "xyz";
    Console.WriteLine("1) str1 = '{0}'", str1);
    Console.WriteLine("2) str2 = '{0}'", str2);
    str2 = String.Copy(str1);
    Console.WriteLine("3) str1 = '{0}'", str1);
    Console.WriteLine("4) str2 = '{0}'", str2);
This example produces the following results:
1) str1 = 'abc'
2) str2 = 'xyz'
3) str1 = 'abc'
4) str2 = 'abc'

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.