# Construct InfiniteLine Example (C#)

This example shows how to construct an InfiniteLine.

    //--------------------------------------------------------------
    // Preconditions:
    // 1. Create a C# Windows console project.
    // 2. Copy and paste this example into the C# IDE.
    // 3. Add a reference to:
    //    install_dir\APISDK\tlb\DraftSight.Interop.dsAutomation.dll.
    // 4. Add references to System and System.Windows.Forms.
    // 5. Start DraftSight and open a document.
    // 6. Start debugging the project.
    //
    // Postconditions: A message box pops up when an InfiniteLine is
    // constructed in the drawing document.
    //----------------------------------------------------------------
    using DraftSight.Interop.dsAutomation;
    using System;
    using System.Runtime.InteropServices;
    using System.Windows.Forms;
    static class Module1
    {
        public static void Main()
        {
            DraftSight.Interop.dsAutomation.Application dsApp;
            Document dsDoc = default(Document);
            Model dsModel = default(Model);
            SketchManager dsSketchManager = default(SketchManager);
            InfiniteLine dsInfiniteLine = default(InfiniteLine);
            double x1 = 0;
            double y1 = 0;
            double z1 = 0;
            double x2 = 0;
            double y2 = 0;
            double z2 = 0;

            //Connect to DraftSight
            dsApp = (DraftSight.Interop.dsAutomation.Application)Marshal.GetActiveObject("DraftSight.Application");
    	dsApp.AbortRunningCommand(); // abort any command currently running in DraftSight to avoid nested commands
            //Get active document
            dsDoc = dsApp.GetActiveDocument();
            if (dsDoc != null)
            {
                //Get model space
                dsModel = dsDoc.GetModel();
                //Get Sketch Manager
                dsSketchManager = dsModel.GetSketchManager();

               //InfiniteLine parameters
                x1 = 0.0;
                y1 = 0.0;
                z1 = 0.0;
                x2 = 1.0;
                y2 = 5.0;
                z2 = 0.0;

                //Construct an InfiniteLine
                dsInfiniteLine = dsSketchManager.InsertInfiniteLine(x1, y1, z1, x2, y2, z2);
                if (dsInfiniteLine != null)
                {
                    MessageBox.Show("InfiniteLine was added to drawing.");
                }
            }
            else
            {
                MessageBox.Show("There are no open documents in DraftSight.");
            }
        }
    }