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String.Equality Operator
Determines whether two specified strings have the same value.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- a
- Type: System.String
The first string to compare, or null.
- b
- Type: System.String
The second string to compare, or null.
Return Value
Type: System.Booleantrue 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.
 Note |
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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 System; class EqualityOp { public static void Main() { Console.WriteLine( "This example of the String Equality operator\n" + "generates the following output.\n" ); CompareAndDisplay( "ijkl" ); CompareAndDisplay( "ABCD" ); CompareAndDisplay( "abcd" ); } static void CompareAndDisplay( string Comparand ) { String Lower = "abcd"; Console.WriteLine( "\"{0}\" == \"{1}\" ? {2}", Lower, Comparand, Lower == Comparand ); } } /* This example of the String Equality operator generates the following output. "abcd" == "ijkl" ? False "abcd" == "ABCD" ? False "abcd" == "abcd" ? True */
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
