Fastest way to format a phone number in C#?
What is the fastest way to format a string using the US phone format [(XXX) XXX-XXXX] using c#?

My source format is a string.  
Fastest way to format a phone number in C#?
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What is the fastest way to format a string using the US phone format [(XXX) XXX-XXXX] using c#?

My source format is a string.  