WriteLine$X lineStartPointX Y lineStartPointY Z lineStartPointZ

The code snippet provided is using string interpolation in C# to print the values of the X, Y, and Z coordinates of a line's start point. The output will be in the format "X: {value of X coordinate}, Y: {value of Y coordinate}, Z: {value of Z coordinate}".

Here's an example usage:

Line line = new Line(new Point(2, 3, 4), new Point(5, 6, 7));
Console.WriteLine($"X: {line.StartPoint.X}, Y: {line.StartPoint.Y}, Z: {line.StartPoint.Z}");

Output:

X: 2, Y: 3, Z: 4