String.Equals Method (Object)
.NET Framework (current version)
Determines whether this instance and a specified object, which must also be a String object, have the same value.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- obj
-
Type:
System.Object
The string to compare to this instance.
Return Value
Type: System.Booleantrue if obj is a String and its value is the same as this instance; otherwise, false. If obj is null, the method returns false.
This method performs an ordinal (case-sensitive and culture-insensitive) comparison.
The following example demonstrates the Equals method.
// Sample for String.Equals(Object) // String.Equals(String) // String.Equals(String, String) using System; using System.Text; class Sample { public static void Main() { StringBuilder sb = new StringBuilder("abcd"); String str1 = "abcd"; String str2 = null; Object o2 = null; Console.WriteLine(); Console.WriteLine(" * The value of String str1 is '{0}'.", str1); Console.WriteLine(" * The value of StringBuilder sb is '{0}'.", sb.ToString()); Console.WriteLine(); Console.WriteLine("1a) String.Equals(Object). Object is a StringBuilder, not a String."); Console.WriteLine(" Is str1 equal to sb?: {0}", str1.Equals(sb)); Console.WriteLine(); Console.WriteLine("1b) String.Equals(Object). Object is a String."); str2 = sb.ToString(); o2 = str2; Console.WriteLine(" * The value of Object o2 is '{0}'.", o2); Console.WriteLine(" Is str1 equal to o2?: {0}", str1.Equals(o2)); Console.WriteLine(); Console.WriteLine(" 2) String.Equals(String)"); Console.WriteLine(" * The value of String str2 is '{0}'.", str2); Console.WriteLine(" Is str1 equal to str2?: {0}", str1.Equals(str2)); Console.WriteLine(); Console.WriteLine(" 3) String.Equals(String, String)"); Console.WriteLine(" Is str1 equal to str2?: {0}", String.Equals(str1, str2)); } } /* This example produces the following results: * The value of String str1 is 'abcd'. * The value of StringBuilder sb is 'abcd'. 1a) String.Equals(Object). Object is a StringBuilder, not a String. Is str1 equal to sb?: False 1b) String.Equals(Object). Object is a String. * The value of Object o2 is 'abcd'. Is str1 equal to o2?: True 2) String.Equals(String) * The value of String str2 is 'abcd'. Is str1 equal to str2?: True 3) String.Equals(String, String) Is str1 equal to str2?: True */
Universal Windows Platform
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
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
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