Use string.Equals over string.Compare in ContentType for improved performance

[h3xds1nz]

Description

Replaces two uses of string.Compare in ContentType which is used for equality check with string.Equals.

Difference in the last character

Method	Mean [ns]	Error [ns]	StdDev [ns]	Code Size [B]	Allocated [B]
Original	36.525 ns	0.7577 ns	0.7781 ns	446 B	-
PR_EDIT	4.873 ns	0.0175 ns	0.0155 ns	467 B	-

Difference in 5th character

Method	Mean [ns]	Error [ns]	StdDev [ns]	Code Size [B]	Allocated [B]
Original	4.627 ns	0.0493 ns	0.0437 ns	446 B	-
PR_EDIT	2.668 ns	0.0138 ns	0.0129 ns	467 B	-

Benchmark source strings

//First invocation (last char is different)
return string.Compare("someveryrandomstringthatwillonlydifferintheveryendwewillmakesureofit0",
"someveryrandomstringthatwillonlydifferintheveryendwewillmakesureofit1", 
StringComparison.OrdinalIgnoreCase) == 0;
return string.Equals("someveryrandomstringthatwillonlydifferintheveryendwewillmakesureofit0",
"someveryrandomstringthatwillonlydifferintheveryendwewillmakesureofit1", 
StringComparison.OrdinalIgnoreCase);

//Second invocation (5th char is different)
return string.Compare("some0veryrandomstringthatwillonlydifferintheveryendwewillmakesureofit0",
"some1veryrandomstringthatwillonlydifferintheveryendwewillmakesureofit1", 
StringComparison.OrdinalIgnoreCase) == 0;
return string.Equals("some0veryrandomstringthatwillonlydifferintheveryendwewillmakesureofit0",
"some1veryrandomstringthatwillonlydifferintheveryendwewillmakesureofit1", 
StringComparison.OrdinalIgnoreCase);

Customer Impact

Improved performance.

Regression

No.

Testing

Local build.

Risk

None, you can't ruin anything with this swap.

Microsoft Reviewers: Open in CodeFlow

[h3xds1nz]

CI failure caused by #9632 requesting System.Drawing.Common from .NET 8 (v8.0.8).

[lindexi]

Reference: #7836

I forgot about the subsequent optimization...

[h3xds1nz]

Now it shall be complete haha.

[lindexi]

Good job

[harshit7962]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[siagupta0202]

LGTM

[harshit7962]

@h3xds1nz Thank you for your contributions.

[h3xds1nz]

@harshit7962 Thank you for including them.