I don't know about the direct equivalent. The closest match I can find is
Convert.ToInt32(string s, int baseFrom);
So you can convert your char to a string, and then pass it to the function above to get int32 or Int16 or Byte, or you want to process it:
char c = 'F'; int digit = Convert.ToInt32(c.ToString(),16);
Note. Convert will throw a FormatException if char is not a digit
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