Question

When try to convert string value in date-time format some time string variable comes with null value at that time it throws exception invalid format of the sting.
e.g

string abc=//date vale
 datetime dt=new datetime();
 dt=DateTime.Parse(abc);
//if abc comes null it throws exception.
//I can check in this way
if(abc!=null)
{
 dt=DateTime.Parse(abc);
}

Answer 1

Have a look at DateTime.TryParse^[MSDN].

EDIT:

If you don’t want to duplicate this code, put it in a method, perhaps with a nullable return value:

public DateTime? ParseDate(string dateString)
{
    DateTime dt;
    if (DateTime.TryParse(dateString, out dt))
    {
        return dt;
    }
    else
    {
        return null;
    }
}