String.Equality Operator (String, String)
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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. It enables code such as that shown in the Example section. The operator, in turn, calls the static Equals(String, String) method, which performs an ordinal (case-sensitive and culture-insensitive) comparison.
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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 */
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1