Get the dollar value of a number without an automatic rounding ...

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C#

I need a more elegant way of obtaining the integer value of a dollar amount without any rounding taking place ... for example 18.22 should return 18 and 18.99 should return 18. Here is how I'm doing it now ... it works but it feels pretty inelegant. Anyone care to take a stab at prettying this up for me?

string strNumberToRound = numberToRound.ToString();
int index = strNumberToRound.IndexOf(".");
string dollarValue = (index > 0 ? strNumberToRound.Substring(0, index) : numberToRound.ToString());
decimal number1 = Convert.ToDecimal(dollarValue);

Thanks for your help in advance!

What I have tried:

See code snippet above ... I'm using string manipulations to accomplish the task