c# - How to safely access actionContext.Request.Headers.GetValues if the key is not found? -

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i doing this, throws exception if key not found.

this snippet inside of web api filter inherits actionfilterattribute, in overriden method onactionexecuting.

if (actioncontext.request.headers.getvalues("some_key") != null                  && actioncontext.request.headers.getvalues("some_key").first() == "hello") {  }

am forced wrap in try/catch?

class myfilter : system.web.http.filters.actionfilterattribute {     public override void onactionexecuting(system.web.http.controllers.httpactioncontext actioncontext)     {         ienumerable<string> values;         if (actioncontext.request.headers.trygetvalues("some_key", out values) && values.first() == "hello")         {          }     } }

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