Question

For example if both values are int type it adds them…. ie 2+2=4

if both values are float….ie 2.2+2.3=4.5
or if one value is string and second is int…ie 1 + Pak=1Pak

We will get these two values from user using tfwo textboxes

Answer 1

This would be one way of doing it. Without having to convert to string and than back to numeric.

public object Add(IConvertible a, IConvertible b)
{
    if(IsNumeric(a) && IsNumeric(b))
        return a.ToDouble(CultureInfo.InvariantCulture) + b.ToDouble(CultureInfo.InvariantCulture);
    return a.ToString() + b.ToString();
}

public static bool IsNumeric(object o)
{
    var code = (int)Type.GetTypeCode(o.GetType());
    return code >= 4 && code <= 15;
}