Property this

Gets or sets the element at the given 2-D index. Reading an absent element returns default (without creating it); assigning creates the element.

public T this[int i0, int i1] { get; set; }

Gets or sets the element at the given 3-D index. Reading an absent element returns default (without creating it); assigning creates the element.

public T this[int i0, int i1, int i2] { get; set; }

Gets or sets the element at the given n-D index. Reading an absent element returns default (without creating it); assigning creates the element.

public T this[ReadOnlySpan<int> index] { get; set; }