Is it possible using Regex.Replace to match a string, but only replace a portion of that matched string? Some way to mark part of the string that should be replaced with the replacement text parame开发者_高级运维ter?

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You can use groups to insert parts of the original string, or you can use lookbehind and lookahead.

Examples

Using Groups:

someString = Regex.Replace(someString, @"(before)content(after)", "$1new content$2");

Using lookaround:

someString = Regex.Replace(someString, @"(?<=before)content(?=after)", @"new content");