How to turn string into readable by php server way? (C#)

I know that my server on real form submit turns %CE%EB%E5%E3+%DF%EA%F3%F8%EA%E8%ED into Олег Якушкин . How to peform string transfer from Олег Якушкин into 开发者_Go百科 %CE%EB%E5%E3+%DF%EA%F3%F8%EA%E8%ED using C#?

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Like this:

Uri.EscapeDataString(str)

Note that this will encode a space character as %20, not +. However, PHP should handle that fine.

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HttpUtility.UrlEncode