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Home/ Questions/Q 4064926
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Editorial Team
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Editorial Team
Asked: May 20, 20262026-05-20T15:55:07+00:00 2026-05-20T15:55:07+00:00

I just went to write the line… if (!e.PeriodicData.Keys.Contains(process)) { } but did a

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I just went to write the line…

if (!e.PeriodicData.Keys.Contains(process))
{
}

but did a typo on “!” and hit “@” instead. eg

if (@e.PeriodicData.Keys.Contains(process))
{
}

I was expecting intellisense to flipout but it didn’t. So I compiled and it compiled successfully.

Its not an operator, so what is “@”? What does it do?

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  1. Editorial Team
    Editorial Team
    2026-05-20T15:55:08+00:00Added an answer on May 20, 2026 at 3:55 pm

    In this case its a valid name. It is used if you want to use a keyword as a variable name like @class.

    See: What does placing a @ in front of a C# variable name do?

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