Converting ObservableCollection as IEnumerable returns null
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After the following code has been executed:
ObservableCollection<int> temp = new ObservableCollection<int>() { 1 };
IEnumerable<object> items = temp as IEnumerable<object>;
items is null, why is this, ObservableCollection implements the IEnumerable interface and everything inherits from object in c#?
What am I missing?
c# type-conversion
asked Nov 16 '18 at 12:22
AlfieAlfie
11510
add a comment |
0
After the following code has been executed:
ObservableCollection<int> temp = new ObservableCollection<int>() { 1 };
IEnumerable<object> items = temp as IEnumerable<object>;
items is null, why is this, ObservableCollection implements the IEnumerable interface and everything inherits from object in c#?
What am I missing?
c# type-conversion
asked Nov 16 '18 at 12:22
AlfieAlfie
11510
2
Possible duplicate of Generic List<T> as IEnumerable<object>
– mjwills
Nov 16 '18 at 12:24
Consider changing the second line toIEnumerable<object> items = temp.Cast<object>();
– mjwills
Nov 16 '18 at 12:27
@mjwills: That would work. The interesting part is why the covariant conversion fromIEnumerable<int>toIEnumerable<object>does not work.
– Sefe
Nov 16 '18 at 12:28
Agreed @Sefe. You should post one of the (many!) links on that topic as a duplicate. Perhaps stackoverflow.com/questions/12454794/… ?
– mjwills
Nov 16 '18 at 12:29
I believe this has been discussed here: stackoverflow.com/a/3541712/383426
– Nick
Nov 16 '18 at 12:29
add a comment |
0
0
0
After the following code has been executed:
ObservableCollection<int> temp = new ObservableCollection<int>() { 1 };
IEnumerable<object> items = temp as IEnumerable<object>;
items is null, why is this, ObservableCollection implements the IEnumerable interface and everything inherits from object in c#?
What am I missing?
c# type-conversion
asked Nov 16 '18 at 12:22
AlfieAlfie
11510
After the following code has been executed:
ObservableCollection<int> temp = new ObservableCollection<int>() { 1 };
IEnumerable<object> items = temp as IEnumerable<object>;
items is null, why is this, ObservableCollection implements the IEnumerable interface and everything inherits from object in c#?
What am I missing?
c# type-conversion
c# type-conversion
asked Nov 16 '18 at 12:22
AlfieAlfie
11510
asked Nov 16 '18 at 12:22
AlfieAlfie
11510
asked Nov 16 '18 at 12:22
AlfieAlfie
11510
asked Nov 16 '18 at 12:22
AlfieAlfie
11510
asked Nov 16 '18 at 12:22
AlfieAlfie
11510
11510
2
Possible duplicate of Generic List<T> as IEnumerable<object>
– mjwills
Nov 16 '18 at 12:24
Consider changing the second line toIEnumerable<object> items = temp.Cast<object>();
– mjwills
Nov 16 '18 at 12:27
@mjwills: That would work. The interesting part is why the covariant conversion fromIEnumerable<int>toIEnumerable<object>does not work.
– Sefe
Nov 16 '18 at 12:28
Agreed @Sefe. You should post one of the (many!) links on that topic as a duplicate. Perhaps stackoverflow.com/questions/12454794/… ?
– mjwills
Nov 16 '18 at 12:29
I believe this has been discussed here: stackoverflow.com/a/3541712/383426
– Nick
Nov 16 '18 at 12:29
add a comment |
2
Possible duplicate of Generic List<T> as IEnumerable<object>
– mjwills
Nov 16 '18 at 12:24
Consider changing the second line toIEnumerable<object> items = temp.Cast<object>();
– mjwills
Nov 16 '18 at 12:27
@mjwills: That would work. The interesting part is why the covariant conversion fromIEnumerable<int>toIEnumerable<object>does not work.
– Sefe
Nov 16 '18 at 12:28
Agreed @Sefe. You should post one of the (many!) links on that topic as a duplicate. Perhaps stackoverflow.com/questions/12454794/… ?
– mjwills
Nov 16 '18 at 12:29
I believe this has been discussed here: stackoverflow.com/a/3541712/383426
– Nick
Nov 16 '18 at 12:29
2
2
Possible duplicate of Generic List<T> as IEnumerable<object>
– mjwills
Nov 16 '18 at 12:24
Possible duplicate of Generic List<T> as IEnumerable<object>
– mjwills
Nov 16 '18 at 12:24
Consider changing the second line to
IEnumerable<object> items = temp.Cast<object>();– mjwills
Nov 16 '18 at 12:27
Consider changing the second line to
IEnumerable<object> items = temp.Cast<object>();– mjwills
Nov 16 '18 at 12:27
@mjwills: That would work. The interesting part is why the covariant conversion from
IEnumerable<int> to IEnumerable<object> does not work.– Sefe
Nov 16 '18 at 12:28
@mjwills: That would work. The interesting part is why the covariant conversion from
IEnumerable<int> to IEnumerable<object> does not work.– Sefe
Nov 16 '18 at 12:28
Agreed @Sefe. You should post one of the (many!) links on that topic as a duplicate. Perhaps stackoverflow.com/questions/12454794/… ?
– mjwills
Nov 16 '18 at 12:29
Agreed @Sefe. You should post one of the (many!) links on that topic as a duplicate. Perhaps stackoverflow.com/questions/12454794/… ?
– mjwills
Nov 16 '18 at 12:29
I believe this has been discussed here: stackoverflow.com/a/3541712/383426
– Nick
Nov 16 '18 at 12:29
I believe this has been discussed here: stackoverflow.com/a/3541712/383426
– Nick
Nov 16 '18 at 12:29
add a comment |
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2
Possible duplicate of Generic List<T> as IEnumerable<object>
– mjwills
Nov 16 '18 at 12:24
Consider changing the second line to
IEnumerable<object> items = temp.Cast<object>();– mjwills
Nov 16 '18 at 12:27
@mjwills: That would work. The interesting part is why the covariant conversion from
IEnumerable<int>toIEnumerable<object>does not work.– Sefe
Nov 16 '18 at 12:28
Agreed @Sefe. You should post one of the (many!) links on that topic as a duplicate. Perhaps stackoverflow.com/questions/12454794/… ?
– mjwills
Nov 16 '18 at 12:29
I believe this has been discussed here: stackoverflow.com/a/3541712/383426
– Nick
Nov 16 '18 at 12:29