Visual Studio和名称空间

Question

I am attempting to move some code from one VS2008 project to another.

The project I am taking the code from works perfectly and I am not changing the code in any way when copying it to the new project.

The code is along the lines of :

using System;
using System.Collections;
using System.Collections.Generic;
using System.Drawing;
using System.Text;
using System.Diagnostics;

using System.ComponentModel;
using System.ComponentModel.Design;
using System.ComponentModel.Design.Serialization;
using System.Reflection;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace CommonTools
{

public class ColumnCollectionEditor : CollectionEditor
{
     .....
}
}

The problem I have is that in the "new" project VS does not find "CollectionEditor" within the supplied namespaces and as such the project will not build.

Both the "new" and "old" projects are targeting .NET 3.5

Any ideas where I am going wrong here.

Answer 1

Do you have the

 System.Design.dll

assembly added to your refenerances?

you can see in which namespace and assembly it is at CollectionEditor Class

Answer 2

Make sure your new project references the same assemblies that your old project did.

MSDN Says that System.ComponentModel.Design.ColectionEditor is in System.Design.dll .

Answer 3

您是否尝试过在原始解决方案中的CollectionEditor上使用“转到定义”以查看应包含的内容？

Answer 4

您是否包含此“ System.Design.dll”？