public static TResult[,] SelectArray <TSource, TResult>(this TSource[,] source, Func <TSource, TResult> selector)
{
var lengths = source.GetDimensionLengths();
var result = new TResult[lengths[0], lengths[1]];
for (int i = 0; i < lengths[0]; i++)
{
for (int j = 0; j < lengths[1]; j++)
{
result[i, j] = selector(source[i, j]);
}
}
return(result);
}