All the operations of LINQ ienumerable

 

Ienumerable <t> main interface member

 

Member	Function
Aggregate	Apply the accumulators function to the sequence. You can specify the accumulate method.
Sum	Calculates the sum of all elements in a sequence. The return values include int, long, float, double, and decimal. You can specify the ing method from the element to the value.
Average	Calculates the average value of all elements in a sequence. The returned values include int, long, float, double, and decimal. You can specify the ing method from the element to the value.
Max	Calculates the maximum values of all elements in a sequence. The returned values include int, long, float, double, and decimal. You can specify the ing method from the element to the value.
Min	Calculates the minimum values of all elements in a sequence. The returned values include int, long, float, double, and decimal. You can specify the ing method from the element to the value.
All	Check whether all elements in the sequence meet the conditions. You can specify the condition judgment method. If all elements meet the conditions, true is returned. Otherwise, false is returned.
Any	Check whether any element in the sequence meets the conditions. You can specify the condition judgment method. If more than one element meets the conditions, true is returned; otherwise, false is returned.
Contains	Check whether the data series contains specific elements. You can specify equal comparison methods.
Count	Returns the number of elements that meet the specified conditions in the sequence. You can specify the condition judgment method.
Longcount	Returns the number of elements that meet the specified conditions in the sequence. You can specify the condition judgment method.
Cast	Converts an element in ienumerable to a specified data type.
Defaultifempty	Returns the element at the specified position in the sequence. If the sequence is null, the default element value is returned.
Elementat	Returns the element of the specified index in the sequence.
Elementatordefault	Returns the element at the specified index in the sequence. If the sequence is null, the default value is returned.
First	Returns the first element in the sequence that meets the specified condition. You can specify the condition judgment method.
Firstordefault	Returns the first element in the sequence that meets the specified conditions. If the condition does not exist, the default value is returned. You can also specify the condition determination method.
Last	Returns the last element in the sequence that meets the specified condition. You can specify the condition judgment method.
Lastordefault	Returns the last element in the sequence that meets the specified conditions. If the condition does not exist, the default value is returned. You can also specify the condition determination method.
Single	Returns the unique element in the sequence that meets the specified conditions. If more than one element meets the conditions, a condition judgment method can be specified.
Singleordefault	Returns the unique element in the sequence that meets the specified conditions. If no element exists, the default value is returned. If more than one element meets the conditions, a condition judgment method can be specified.
Reverse	Reverse the order of elements in a sequence
Distinct	Returns a set of non-repeated elements in a sequence. You can specify an equal comparison method.
Concat	Connect the two sequences and connect them directly to the beginning and end. Duplicate data may exist in the returned results.
Except	Obtains the difference set of two element sets. You can specify the equal comparison method.
Intersect	Obtains the intersection of two element sets. You can specify an equal comparison method.
Union	Obtains the union of two element sets. You can specify an equal comparison method.
Sequenceequal	Compare the two sequences to see if they are equal. You can specify an equal comparison method.
Where	Filters elements in a set based on specified conditions, and returns a set of elements that meet the conditions.
Skip	Skips the specified number of elements in the sequence and returns the remaining elements.
Skipwhile	Skip the elements that meet the specified conditions in the sequence, and then return the remaining elements. You can specify the condition judgment method.
Take	Returns a specified number of continuous elements starting with a sequence.
Takewhile	Returns the continuous element that satisfies the specified condition starting from the sequence. You can specify the condition judgment method.
Toarray	Create an array from ienumerable <t>
Tolist	Create a list from ienumerable <t>

Ienumerable <t> provides the following methods:

Numeric operations (sum, Min, Max, average)

Number of elements (count, longcount)

Values (first, last, elementat, etc)

Extract subset (Skip, skipwhile, take, takewhile ,)

Set Operations (reverse, Concat, distinct, distinct T, intersect, union, sequenceequal, etc)

These methods provide all the operations required by LINQ.