C# | Copying the Collection<T> elements to an array
Collection<T>.CopyTo(T, Int32) method is used to copy the entire Collection<T> to a compatible one-dimensional Array, starting at the specified index of the target array.
public void CopyTo (T array, int index);
array : The one-dimensional Array that is the destination of the elements copied from Collection<T>. The Array must have zero-based indexing.
index : The zero-based index in array at which copying begins.
- ArgumentNullException : If the array is null.
- ArgumentOutOfRangeException : If the index is less than zero.
- ArgumentException : If the number of elements in the source Collection<T> is greater than the available space from index to the end of the destination array.
Below given are some examples to understand the implementation in a better way:
A B C D E
System.ArgumentOutOfRangeException: Value has to be >= 0.
Parameter name: destinationIndex
- This method uses Array.Copy to copy the elements.
- The elements are copied to the Array in the same order in which the enumerator iterates through the Collection<T>.
- This method is an O(n) operation, where n is Count.