/// <summary>
/// Called when element of the matrix is changed.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="MatrixEventArgs{T}"/> instance containing the event data.</param>
protected virtual void OnElementChanged(object sender, MatrixEventArgs <T> e)
{
EventHandler <MatrixEventArgs <T> > temp = ElementChanged;
temp?.Invoke(sender, e);
}
/// <summary>
/// Called when [element changed].
/// </summary>
/// <param name="i">The i.</param>
/// <param name="j">The j.</param>
private void OnElementChanged(int i, int j)
{
MatrixEventArgs e = new MatrixEventArgs(i, j);
this.ElementChanged?.Invoke(this, e);
}