String.GetHashCode Method
Returns the hash code for this string.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
The behavior of GetHashCode is dependent on its implementation, which might change from one version of the common language runtime to another. A reason why this might happen is to improve the performance of GetHashCode.
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If two string objects are equal, the GetHashCode method returns identical values. However, there is not a unique hash code value for each unique string value. Different strings can return the same hash code. For more information about hash codes, see Object.GetHashCode. |
The value returned by GetHashCode is platform-dependent. It differs on the 32-bit and 64-bit versions of the .NET Framework.
The following example demonstrates the GetHashCode method using various input strings.
using System; class GetHashCode { public static void Main() { DisplayHashCode( "" ); DisplayHashCode( "a" ); DisplayHashCode( "ab" ); DisplayHashCode( "abc" ); DisplayHashCode( "abd" ); DisplayHashCode( "abe" ); DisplayHashCode( "abcdef" ); DisplayHashCode( "abcdeg" ); DisplayHashCode( "abcdeh" ); DisplayHashCode( "abcdei" ); DisplayHashCode( "Abcdeg" ); DisplayHashCode( "Abcdeh" ); DisplayHashCode( "Abcdei" ); } static void DisplayHashCode( String Operand ) { int HashCode = Operand.GetHashCode( ); Console.WriteLine("The hash code for \"{0}\" is: 0x{1:X8}, {1}", Operand, HashCode ); } } /* This example displays output like the following: The hash code for "" is: 0x2D2816FE, 757602046 The hash code for "a" is: 0xCDCAB7BF, -842352705 The hash code for "ab" is: 0xCDE8B7BF, -840386625 The hash code for "abc" is: 0x2001D81A, 536991770 The hash code for "abd" is: 0xC2A94CB5, -1029092171 The hash code for "abe" is: 0x6550C150, 1699791184 The hash code for "abcdef" is: 0x1762906D, 392335469 The hash code for "abcdeg" is: 0x1763906D, 392401005 The hash code for "abcdeh" is: 0x175C906D, 391942253 The hash code for "abcdei" is: 0x175D906D, 392007789 The hash code for "Abcdeg" is: 0x1763954D, 392402253 The hash code for "Abcdeh" is: 0x175C954D, 391943501 The hash code for "Abcdei" is: 0x175D954D, 392009037 */
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.
