StringBuilder 命名空间，c#，Visual Studio 2010

Question

What namespace does StringBuilder belong to?

I typed:

using System.Text.StringBuilder;

But the intellisense, won't let me type StringBuilder .

Answer 1

Its very easy to determine in which namespace .NET class lives. you have two ways:

1. Find interesting class in MSDN and in Inheritance Hierarchy section you can see FULL class name. Full class name means that before class name would be its namespace. For StringBuilder full class name would face as System.Text.StringBuilder . Just omit class name (StringBuilder) and you get namespace
2. Open Object browser in VS and search for interesting class. In results, click on the class and in detail view interesting information will appear:

I always use second way, because its more easy for me.

Answer 2

using directives "import" namespaces, so it should read using System.Text;

Answer 3

It's in the System.Text namespace.

http://msdn.microsoft.com/en-us/library/2839d5h5(v=VS.100).aspx

If you're ever unsure what namespace something is in, type it into the editor (eg StringBuilder ) and hit Ctrl. (control dot) to bring up the possible namespaces.

VS2010 will then insert a using declaration into the file for you.

Answer 4

Remove the .StringBuilder in your using directive. StringBuilder is the class itsself.

Answer 5

The namespace is System.Text , not System.Text.StringBuilder

Answer 6

Alternatively you can just type StringBuilder , right click it, and choose "Resolve >". This way you can import the right namespace without knowing the name. You'd have to type the class name correctly though.

Answer 7

If you have the.dll file added as a reference (and for something as basic as that, you have the reference), simply write StringBuilder (case-sensative) and hit Alt+Shift+F12 (or mouse over the small arrow near it) and you'll see a list of possible solutions, one of them will be to automatically add the correct using, which, in this case is:

using System.Text

Answer 8

Namespace StringBuilder belong to - System.Text;