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Run Interference Detection Example (C#)

This example shows how to perform interference detection on an assembly.

// Preconditions:
// 1. Open:

// <SolidWorks_install_dir>\samples\tutorial\advdrawings\bowl and chute.sldasm.
// 2. Open an Immediate Window.

// 3. Rename the namespace of this macro to match the name of your C# project.
// Postconditions: Inspect the Immediate Window for interference information.

// NOTE: Because the assembly is used in SolidWorks tutorials,

// do not save any changes to it.
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System;
using System.Diagnostics;
namespace RunInterferenceDetection_CSharp.csproj
partial class SolidWorksMacro

public void Main()

ModelDoc2 swModelDoc = default(ModelDoc2);
AssemblyDoc swAssemblyDoc = default(AssemblyDoc);
InterferenceDetectionMgr pIntMgr = default(InterferenceDetectionMgr);
Object[] vInts = null;
Object[] vComps = null;
IInterference interference = default(IInterference);
Component2 comp = default(Component2);

            swModelDoc = (
            swAssemblyDoc = (
            pIntMgr = swAssemblyDoc.InterferenceDetectionManager;

// Specify the interference detection settings and options
            pIntMgr.TreatCoincidenceAsInterference = false;
            pIntMgr.TreatSubAssembliesAsComponents =
            pIntMgr.IncludeMultibodyPartInterferences =
            pIntMgr.MakeInterferingPartsTransparent =
            pIntMgr.CreateFastenersFolder =
            pIntMgr.IgnoreHiddenBodies =
            pIntMgr.ShowIgnoredInterferences =

//Specify how to display non-interfering components
            pIntMgr.NonInterferingComponentDisplay = (int)swNonInterferingComponentDisplay_e.swNonInterferingComponentDisplay_Wireframe;

// Run interference detection
            vInts = (object[])pIntMgr.GetInterferences();
Debug.Print("# of interferences: " + pIntMgr.GetInterferenceCount());

// Ignore an interference
            interference = (Interference)vInts[0];
            interference.Ignore =

// Run interference detection again (should detect one less interference)
            vInts = (object[])pIntMgr.GetInterferences();
Debug.Print("# of interferences after one is ignored: " + pIntMgr.GetInterferenceCount());

long i = 0;
long j = 0;
double vol = 0;
for (i = 0; i <= vInts.GetUpperBound(0); i++)
Debug.Print("Interference " + (i + 1));
                interference = (
Debug.Print("Number of components in this interference: " + interference.GetComponentCount());
                vComps = (
for (j = 0; j <= vComps.GetUpperBound(0); j++)
                    comp = (
Debug.Print(" " + comp.Name2);
                vol = interference.Volume;

Debug.Print("Interference volume is " + (vol * 1000000000) + " mm^3");

// Stop interference detection

public SldWorks swApp;


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