Assigning class to variable with "using"

Question

Simple question that I can't seem to wrap my head around. Say I want to save time/space when working with commonly used System classes and I want to assign an entire class/subclass such as System.Threading.Thread to a variable so that I can use the shortened Variable.ThreadMethod() whenever I want to use a method of the Thread class.

I though it was done with the following:

using test = System.Threading.Thread;

However this throws the "Invalid token 'using' in class, struct or interface declaration." The context of what I am trying to do is the following:

    using test = System.Threading.Thread;
    public void Method()
    {
       test.Sleep(1000); //Same as System.Threading.Thread.Sleep(1000);
    }

BTW, the usual (idiomatic) way of doing this is to have using System.Threading; and then just Thread.Sleep(1000);, or to spell it out in full if necessary. Using using like this is rare, and I wouldn't recommend it (characters are cheap, confusion is not). — Tim S.
– Tim S., Commented Mar 20, 2014 at 15:00

SLaks · Accepted Answer · 2014-03-20 14:54:59Z

4

using directives can only appear at the top of the file or namespace.

answered Mar 20, 2014 at 14:54

SLaks

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Patrick Hofman · Accepted Answer · 2014-03-20 14:55:26Z

2

You have to put the using on top of your c# file before declaring a class.

This works:

using test = System.Threading.Thread;

namespace Y
{
    public class X
    {
        public void Method()
        {
           test.Sleep(1000); //Same as System.Threading.Thread.Sleep(1000);
        }
    }
}

answered Mar 20, 2014 at 14:55

Patrick Hofman

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Alessandro D'Andria · Accepted Answer · 2014-03-20 14:55:26Z

2

Put your using with the others using:

using test = System.Threading.Thread;

namespace MyNamespace
{
    class MyClass
    {
        test.Sleep(10);
    }
}

answered Mar 20, 2014 at 14:55

Alessandro D'Andria

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