Get ASCII in C#

public static string GetASCIIValue(string strValue)
{
return Encoding.ASCII.GetString(
Encoding.Convert(
Encoding.UTF8,
Encoding.GetEncoding(
Encoding.ASCII.EncodingName,
new EncoderReplacementFallback(string.Empty),
new DecoderExceptionFallback()
),
Encoding.UTF8.GetBytes(strValue)
)
);

}



string s1 = FinancialMIS_Apps.StringManipulation.GetASCIIValue("Expression");
string s2 = FinancialMIS_Apps.StringManipulation.GetASCIIValue("Räksmörgås");