Menu
I have a Dictionary whose elements I need to iterate through and make changes. I cannot use foreach statement, since it sometimes throws InvalidOperationException, saying that the collection cannot be modified during an enumaration.
I can use a for loop, in conjunction with Dictionary.ElementAt method, and I successfully used it in other classes, but in this particular class, the method ElementAt cannot be found! Any ideas?
470
Type ParametersTKey. The type of the keys in the dictionary. TValue. The type of the values in the dictionary. Inheritance.
A dictionary, also called an associative array, is a collection of unique keys and a collection of values, where each key is associated with one value. Retrieving and adding values is very fast. Dictionaries take more memory because for each value there is also a key.
ElementAt() is a System. Linq method in C# that is used to get and display element at a particular index. The following is our string array − string[] arr = { "One", "Two", "Three", "Four", "Five" }; Now to get an element at index 0, use the ElementAt() method − arr.ElementAt(0); The following is the complete code −
ElementAt is an extension method defined in System.Linq.Enumerable.
You need to add a using clause to make it visible:
using System.Linq;
Note that ElementAt on a Dictionary<TKey,TValue> doesn't make a lot of sense, though, as the dictionary implementation does not guarantee elements to be in any specific order, nor that the order does not change if you make changes to the dictionary.
160
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
