problem implementing IEnumerator(T)

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I've got problems implementing System.Collections.Generic.IEnumerator<T>. I have to implement both IEnumerator<T>.Current and IEnumerator.Current. This leads to a conflict of 2 properties with the same name.

The funniest thing about it - I cannot compile an msdn example.
It gives:

error CS0305: Using the generic type 'System.Collections.Generic.IEnumerator<t>' requires '1' type arguments
c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\mscorlib.dll: (Related file)
error CS0738: 'Network.Node<t>.BoxEnumerator' does not implement interface member 'System.Collections.IEnumerator.Current'. 'Network.Node<t>.BoxEnumerator.Current' cannot implement 'System.Collections.IEnumerator.Current' because it does not have the matching return type of 'object'.
c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\mscorlib.dll: (Related file)</t></t></t>

Can anyone help me with this? C# is very new to me. Thanks in advance

Posted 3-Nov-10 9:56am

japcrword

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voloda2 3-Nov-10 16:04pm

Did you tried explicit implementation of interfaces?

2 solutions

Solution 2

Here's also another useful example: http://www.java2s.com/Code/CSharp/Language-Basics/ImplementgenericIEnumerableandIEnumerator.htm

Posted 3-Nov-10 10:20am

japcrword

Updated 3-Nov-10 10:47am

v2

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Nish Nishant 3-Nov-10 16:30pm

See how I've derived BoxCollection from Collection<Box>.

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Nish Nishant · Accepted Answer · 2010-11-03T10:11:00

Solution 1

Implement IEnumerator<T> normally, and IEnumerator explicitly. Then have the IEnumerator version return the IEnumerator<T>.Current.

[Edit]
--------

Btw to get the MSDN code to compile, add dummy classes for Box and BoxCollection:

C#

class Box { }

class BoxCollection : Collection<Box> { }

Posted 3-Nov-10 10:11am

Nish Nishant

Updated 3-Nov-10 10:14am

v2

Comments

japcrword 3-Nov-10 16:45pm

Thank you very much.

Nish Nishant 3-Nov-10 16:46pm

You are most welcome :-)