Comprueba si es numerico o no

Function for lenguage C# (CSharp)

Function to verify if numeric or not

public bool IsNumeric(object Expression)
{
bool isNum;
double retNum;

isNum = Double.TryParse(Convert.ToString(Expression), System.Globalization.NumberStyles.Any, System.Globalization.NumberFormatInfo.InvariantInfo, out retNum);
return isNum;
}

Return false o true.
If it is true then it is numeric
If it is false then not it is numeric

By GDiaz.