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c# - Regex to find words that start with /u/

I'm looking for a regex that starts with /u/. I tried the following query:

var matches = Regex.Matches(message, "(\//u/\w+) ");

but it doesn't seem to work. I think it has to do with the slashes?

Example of what the query should do:

"Hello I am /u/myself" -> "/u/myself"
however "Hello I am /u/" should returns nothing

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var matches = Regex.Matches(message, @"/u/.+");

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