Color.Equals seems totally useless

[Ben Voigt [C++ MVP]]

I guess this must be a well-known issue that I just hit my head on.

Color.Equals doesn't apply the usual equality test.

For example:

using (g = Graphics.FromIm age(bmp))
g.FillRectangle (Brushes.Black, new Rectangle(Point .Empty, bmp.Size));

One might expect that for any (x, y) inside the image bounds,

bmp.GetPixel(x, y) == Color.Black

But it's not.

GetPixel returns an unnamed black color, while Color.Black returns a named
black color, and while the value is the same (0xff000000) they compare
unequal!

Anyone know a valid reason for this insanity before I post a bug on Connect?

[Steve Gerrard]

Jon Skeet [C# MVP] wrote:

>
Another concrete example:

string x = "mail";
string y = "MAIL";
bool b = (x.ToUpper() == y);

What's the value of b? I suspect if you ask 1000 C# developers, almost
all of them would say "true". Very few of them would say "It depends
whether or not the current culture is Turkish" which is the correct
answer.

As one of the 1000, may I ask what x.ToUpper() is when the current culture is
Turkish? :)

[Jon Skeet [C# MVP]]

On Feb 19, 9:23 am, "Steve Gerrard" <mynameh...@com cast.netwrote:

Another concrete example:

string x = "mail";
string y = "MAIL";
bool b = (x.ToUpper() == y);

What's the value of b? I suspect if you ask 1000 C# developers, almost
all of them would say "true". Very few of them would say "It depends
whether or not the current culture is Turkish" which is the correct
answer.

As one of the 1000, may I ask what x.ToUpper() is when the current culture is
Turkish? :)

The I has an accent on it. Lower-casing has the same effect (so
y.ToLower()==x wouldn't help). I first ran into this in Java, with
exactly "mail" - I was trying to compare headers.

It's a particularly nasty bit of i18n.

Jon