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GeneralRe: c# Introduction Pin
ormonds10-Jan-18 23:14
ormonds10-Jan-18 23:14 
GeneralRe: c# Introduction Pin
OriginalGriff10-Jan-18 23:25
mvaOriginalGriff10-Jan-18 23:25 
AnswerRe: c# Introduction Pin
Richard MacCutchan10-Jan-18 22:28
mveRichard MacCutchan10-Jan-18 22:28 
GeneralRe: c# Introduction Pin
ormonds10-Jan-18 23:14
ormonds10-Jan-18 23:14 
QuestionHow to compare string data by value and by reference Pin
Mou_kol8-Jan-18 20:59
Mou_kol8-Jan-18 20:59 
AnswerRe: How to compare string data by value and by reference Pin
OriginalGriff8-Jan-18 21:24
mvaOriginalGriff8-Jan-18 21:24 
AnswerRe: How to compare string data by value and by reference Pin
Bernhard Hiller9-Jan-18 21:41
Bernhard Hiller9-Jan-18 21:41 
GeneralRe: How to compare string data by value and by reference Pin
OriginalGriff10-Jan-18 0:38
mvaOriginalGriff10-Jan-18 0:38 
That's where it gets complicated (and why I didn't mention it - he is a beginner, after all).
The compiler can detect and intern strings, but the runtime doesn't unless you specifically ask it to:
string a = "Hello World";
string b = "Hello";
string c = " World";
string d = b + c;
Console.WriteLine("{0}:{1}:{2}:{3}", a == d, a.Equals(d), (object)a == (object)d, object.ReferenceEquals(a, d));
d = string.Intern(d);
Console.WriteLine("{0}:{1}:{2}:{3}", a == d, a.Equals(d), (object)a == (object)d, object.ReferenceEquals(a, d));

Will give you:
True:True:False:False
True:True:True:True
As the "new" string is now in the Intern pool.

However ... in the release version of my original code you will probably get different results, as the optimiser will likely compact that code and intern the strings anyway!

There is a good description of the intern pool here: Understanding C#: String.Intern makes strings interesting - O'Reilly Broadcast[^]
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GeneralRe: How to compare string data by value and by reference Pin
Mou_kol10-Jan-18 21:18
Mou_kol10-Jan-18 21:18 
GeneralRe: How to compare string data by value and by reference Pin
OriginalGriff10-Jan-18 22:02
mvaOriginalGriff10-Jan-18 22:02 
GeneralRe: How to compare string data by value and by reference Pin
Mou_kol11-Jan-18 3:42
Mou_kol11-Jan-18 3:42 
GeneralRe: How to compare string data by value and by reference Pin
Richard Deeming11-Jan-18 4:05
mveRichard Deeming11-Jan-18 4:05 
GeneralRe: How to compare string data by value and by reference Pin
Mou_kol15-Jan-18 22:00
Mou_kol15-Jan-18 22:00 
GeneralRe: How to compare string data by value and by reference Pin
Richard Deeming16-Jan-18 1:21
mveRichard Deeming16-Jan-18 1:21 
GeneralRe: How to compare string data by value and by reference Pin
Mou_kol16-Jan-18 1:44
Mou_kol16-Jan-18 1:44 
GeneralRe: How to compare string data by value and by reference Pin
OriginalGriff11-Jan-18 4:19
mvaOriginalGriff11-Jan-18 4:19 
GeneralRe: How to compare string data by value and by reference Pin
Mycroft Holmes11-Jan-18 10:32
professionalMycroft Holmes11-Jan-18 10:32 
GeneralRe: How to compare string data by value and by reference Pin
OriginalGriff11-Jan-18 11:19
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QuestionC# Windows Form Application with 86x unmanaged dll Pin
Zeyad Jalil8-Jan-18 20:33
professionalZeyad Jalil8-Jan-18 20:33 
AnswerRe: C# Windows Form Application with 86x unmanaged dll Pin
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AnswerRe: C# Windows Form Application with 86x unmanaged dll Pin
Gerry Schmitz10-Jan-18 8:23
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QuestionGame Pin
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