public static void Main()
string inputString = "Variaçà £ o";
string result = Encoding.ASCII.GetString(
Encoding.ASCII.EncodingName,
new EncoderReplacementFallback(string.Empty),
new DecoderExceptionFallback()
Encoding.UTF8.GetBytes(inputString)
string finalresult = result.Replace(" ","");
Console.WriteLine(finalresult);