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Object.Equals Method
.NET Framework 1.1
Determines whether two Object instances are equal.
Overload List
Determines whether the specified Object is equal to the current Object.
Supported by the .NET Compact Framework.
[Visual Basic] Overloads Public Overridable Function Equals(Object) As Boolean
[C#] public virtual bool Equals(object);
[C++] public: virtual bool Equals(Object*);
[JScript] public function Equals(Object) : Boolean;
Determines whether the specified Object instances are considered equal.
[Visual Basic] Overloads Public Shared Function Equals(Object, Object) As Boolean
[C#] public static bool Equals(object, object);
[C++] public: static bool Equals(Object*, Object*);
[JScript] public static function Equals(Object, Object) : Boolean;
Example
[C#, C++, JScript] The following code example compares different objects.
[C#, C++, JScript] Note This example shows how to use one of the overloaded versions of Equals. For other examples that might be available, see the individual overload topics.
[C#] using System; public class MyClass { public static void Main() { string s1 = "Tom"; string s2 = "Carol"; Console.WriteLine("Object.Equals(\"{0}\", \"{1}\") => {2}", s1, s2, Object.Equals(s1, s2)); s1 = "Tom"; s2 = "Tom"; Console.WriteLine("Object.Equals(\"{0}\", \"{1}\") => {2}", s1, s2, Object.Equals(s1, s2)); s1 = null; s2 = "Tom"; Console.WriteLine("Object.Equals(null, \"{1}\") => {2}", s1, s2, Object.Equals(s1, s2)); s1 = "Carol"; s2 = null; Console.WriteLine("Object.Equals(\"{0}\", null) => {2}", s1, s2, Object.Equals(s1, s2)); s1 = null; s2 = null; Console.WriteLine("Object.Equals(null, null) => {2}", s1, s2, Object.Equals(s1, s2)); } } /* This code produces the following output. Object.Equals("Tom", "Carol") => False Object.Equals("Tom", "Tom") => True Object.Equals(null, "Tom") => False Object.Equals("Carol", null) => False Object.Equals(null, null) => True */ [C++] #using <mscorlib.dll> using namespace System; int main() { String* s1 = S"Tom"; String* s2 = S"Carol"; Console::WriteLine(S"Object.Equals(\"{0}\", \"{1}\") => {2}", s1, s2, __box(Object::Equals(s1,s2))); s1 = S"Tom"; s2 = S"Tom"; Console::WriteLine(S"Object.Equals(\"{0}\", \"{1}\") => {2}", s1, s2, __box(Object::Equals(s1,s2))); s1 = 0; s2 = S"Tom"; Console::WriteLine(S"Object.Equals(null, \"{1}\") => {2}", s1, s2, __box(Object::Equals(s1,s2))); s1 = S"Carol"; s2 = 0; Console::WriteLine(S"Object.Equals(\"{0}\", null) => {2}", s1, s2, __box(Object::Equals(s1,s2))); s1 = 0; s2 = 0; Console::WriteLine(S"Object.Equals(null, null) => {2}", s1, s2, __box(Object::Equals(s1,s2))); } /* This code produces the following output. Object.Equals("Tom", "Carol") => False Object.Equals("Tom", "Tom") => True Object.Equals(null, "Tom") => False Object.Equals("Carol", null) => False Object.Equals(null, null) => True */ [JScript] import System package Equals0 { public class MyClass { public static function Main() { var s1 : String = "Tom"; var s2 : String = "Carol"; var array : Object [] = new Object[3]; array[0] = s1; array[1] = s2; array[2] = System.Object.Equals(s1, s2); Console.WriteLine("Object.Equals('{0}', '{1}') => {2}", array); s1 = "Tom"; s2 = "Tom"; array[0] = s1; array[1] = s2; array[2] = System.Object.Equals(s1, s2); Console.WriteLine("Object.Equals('{0}', '{1}') => {2}", array); s1 = null; s2 = "Tom"; array[0] = s1; array[1] = s2; array[2] = System.Object.Equals(s1, s2); Console.WriteLine("Object.Equals(null, '{1}') => {2}", array); s1 = "Carol"; s2 = null; array[0] = s1; array[1] = s2; array[2] = System.Object.Equals(s1, s2); Console.WriteLine("Object.Equals('{0}', null) => {2}", array); s1 = null; s2 = null; array[0] = s1; array[1] = s2; array[2] = System.Object.Equals(s1, s2); Console.WriteLine("Object.Equals(null, null) => {2}", array); } } } Equals0.MyClass.Main(); /* This code produces the following output. Object.Equals("Tom", "Carol") => False Object.Equals("Tom", "Tom") => True Object.Equals(null, "Tom") => False Object.Equals("Carol", null) => False Object.Equals(null, null) => True */
[Visual Basic] No example is available for Visual Basic. To view a C#, C++, or JScript example, click the Language Filter button
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See Also
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