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String::Equality Operator

Determines whether two specified strings have the same value.

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

static bool operator ==(
	String^ a, 
	String^ b


Type: System::String
The first string to compare, or nullptr.
Type: System::String
The second string to compare, or nullptr.

Return Value

Type: System::Boolean
true if the value of a is the same as the value of b; otherwise, false.

The Equality method defines the operation of the equality operator for the String class.

This operator is implemented using the Equals method, which means the comparands are tested for a combination of reference and value equality. This operator performs an ordinal comparison.


   The Visual Basic compiler does not resolve the equality operator as a call to the Equality method. Instead, the equality operator wraps a call to the Operators::CompareString method.

The following example demonstrates the equality operator.

// Example for the String Equality operator.
using namespace System;
void CompareAndDisplay( String^ Comparand )
   String^ Lower = "abcd";
   Console::WriteLine( "\"{0}\" == \"{1}\" ?  {2}", Lower, Comparand, Lower == Comparand );

int main()
   Console::WriteLine( "This example of the String Equality operator\n"
   "generates the following output.\n" );
   CompareAndDisplay( "ijkl" );
   CompareAndDisplay( "ABCD" );
   CompareAndDisplay( "abcd" );

This example of the String Equality operator 
generates the following output.

"abcd" == "ijkl" ?  False
"abcd" == "ABCD" ?  False
"abcd" == "abcd" ?  True

.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

Portable Class Library

Supported in: Portable Class Library

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.