break and continue only ever affected the innermost loop. To steer out of nested loops you needed a Boolean flag checked at every level or a goto to jump past them.

C# 15 lets break and continue name a label on an enclosing loop (or break on a switch) so the jump goes exactly where you mean.

Code

Now

outer: for (int row = 0; row < grid.Height; row++)
{
    for (int column = 0; column < grid.Width; column++)
    {
        if (grid[row, column].IsBlocked)
        {
            continue outer; // Abandon this row, start the next
        }

        if (grid[row, column].IsGoal)
        {
            break outer; // Leave both loops
        }
    }
}

Before (flag)

bool found = false;
for (int row = 0; row < grid.Height && !found; row++)
{
    for (int column = 0; column < grid.Width; column++)
    {
        if (grid[row, column].IsBlocked)
        {
            break; // Abandon this row, start the next
        }

        if (grid[row, column].IsGoal)
        {
            found = true;
            break; // Only leaves the inner loop, the flag stops the outer
        }
    }
}

Before (goto)

for (int row = 0; row < grid.Height; row++)
{
    for (int column = 0; column < grid.Width; column++)
    {
        if (grid[row, column].IsBlocked)
        {
            goto nextRow;
        }

        if (grid[row, column].IsGoal)
        {
            goto done;
        }
    }
    nextRow:;
}
done:;

Notes

• Place the label directly on the loop or switch it identifies. With stacked labels such as a: b: while, only b labels the loop
• continue can only target a loop, so a labeled switch can be the target of break but not continue
• Without a label break and continue behave as before and target the innermost applicable statement
• The IDE0410 style rule flags flag and goto patterns that a labeled jump can replace

More information

• What's new in C# 15.0
• C# Reference
• Feature specification