Is there an equivalent to typedef in c#?

Question

ie something like

typedef Dictionary<string, string> mydict;

I swear I have seen it but cannot find it

BTW:SO would not let me ask a nice succint question, it has to be bigger ! — pm100, May 18 '11 at 17:54
I don't know if it supports generic classes, but you can try the using statement. http://msdn.microsoft.com/en-us/library/sf0df423(v=vs.80).aspx — John Hoven, May 18 '11 at 17:58
Possible duplicate of [Equivalent of typedef in C#](http://stackoverflow.com/questions/161477/equivalent-of-typedef-in-c-sharp) — StayOnTarget, Jan 05 '17 at 14:48

score 19 · Accepted Answer · answered May 18 '11 at 17:57

19

using MyDict = Dictionary<String, String> which is like defining a symbol which would be replaced by the compiler.

answered May 18 '11 at 17:57

Vijay Sirigiri

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+1, with the caveat that it applies only for that one compile scope. – user7116 May 18 '11 at 18:01
note that the using keyword summary http://msdn.microsoft.com/en-us/library/zhdeatwt.aspx doesnt mention this use - which is why i got lost – pm100 May 18 '11 at 18:14
BTW u gotta use the full class name – pm100 May 18 '11 at 18:26
1

The type full name is required only when you have declared the "using statement" outside the namespace construct of the file otherwise not required. – Vijay Sirigiri May 19 '11 at 06:32

score 5 · Answer 2 · answered May 18 '11 at 17:58

5

Sort of.

using IntList = System.Collections.Generic.List<int>;

http://arbel.net/2004/07/07/the-hidden-c-typedef/

One issue is there is no way to #include the definition.

answered May 18 '11 at 17:58

Lou Franco

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score 2 · Answer 3 · answered Mar 15 '13 at 01:49

use inheritance:

public class DoubleNameValueCollection : Dictionary< string, NameValueCollection > { }

Then use as if it were a typedef:

NameValueCollection values = new NameValueCollection();
values.Add( "value1", "value2" );
DoubleNameValueCollection dblNameCol = new DoubleNameValueCollection();
dblNameCol.Add( "key1", values );

Or if you want to confuse others:

DoubleNameValueCollection dblNameCol = new DoubleNameValueCollection
    {
        { "key1", new NameValueCollection 
            {
                { "value1", "value2" }
    }}};

Better name would be NameDoubleValueCollection – guest Mar 15 '13 at 01:51 — guest, Mar 15 '13 at 01:51

score 0 · Answer 4 · answered May 18 '11 at 17:57

0

There is no equivalent of typedef in C#, however you could use 'using' for aliases.

answered May 18 '11 at 17:57

Kromagg

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score 0 · Answer 5 · edited Jun 20 '14 at 02:14

0

There is delegate, which is used for defining a type of method argument,

there is using BlaBla = Full.Name.Space.Yada.Yada;

however, the using statement is only valid in current file.

edited Jun 20 '14 at 02:14

Ryan T. Grimm

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answered May 18 '11 at 17:58

Danny Varod

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Is there an equivalent to typedef in c#?

5 Answers5