DateTime does not exist in the current context

问题

I have the following class

using System;
using System.Globalization;

namespace GenericSomething
{
    public class Specific : Generic
    {
        public override bool DoSomething(string date)
        {
            DateTime newDate = DateTime.ParseExact(date, "yyyyMMdd", CultureInfo.InvariantCulture);
            if (newDate.Date == DateTime.Now.Date)
                return true;
            else
                return false;
        } 
    }
}

When I'm debugging and i use "Add watch" on DateTime.Now.Date, i get

"DateTime does not exist in the current context."

And the condition is never satisfied even if the dates are the same.

Why is that is I'm including System?

回答1:

Here a few things I saw;

• You might be need to add mscorlib.dll as a reference in your project.
• You can't compare with DateTime (newDate) and int (DateTime.Now.Day) with == operator. You might need to use newDate == DateTime.Now instead.
• You are missing semi-colon (;) after your return statements.
• You need to add System.Globalization namespace for using CultureInfo class.

回答2:

Also, check to make sure that you have typed in "DateTime" and not "Datetime" or something else. It has to be "DateTime" (camel case).

来源：https://stackoverflow.com/questions/21526584/datetime-does-not-exist-in-the-current-context