Method Exactly

Exactly<T>(IEnumerable<T>, int)

Determines whether or not the number of elements in the sequence is equals to the given integer.

Declaration

public static bool Exactly<T>(this IEnumerable<T> source, int count)

Parameters

Type	Name	Description
IEnumerable<T>	source	The source sequence
int	count	The exactly number of items a sequence must have for this function to return true.

Returns

Type	Description
bool	true if the number of elements in the sequence is equals to the given integer, false otherwise.

Type Parameters

Name	Description
T	Element type of sequence

Remarks

This method executes immediately.

Examples

The following code example demonstrates how to check that a sequence has as an exact length using Exactly.

var sequence = Enumerable.Range(1, 5);
            
foreach (var x in Enumerable.Range(3, 5))
{
    // Check that a sequence has an exact size
    var result = sequence.Exactly(x);

    Console.WriteLine($"Exactly {x}: {result}");
}

// This code produces the following output:
// Exactly 3: False
// Exactly 4: False
// Exactly 5: True
// Exactly 6: False
// Exactly 7: False

Exceptions

Type	Condition
ArgumentNullException	source is null.
ArgumentOutOfRangeException	count is negative.