If you look the dll's from the SDK they are nothing but empty methods.
Basiclly just the definition
They stripped out guts and left all you needed for your code to reference it and compile.
From SDK
[TypeDescriptionProvider("Autodesk.AutoCAD.ComponentModel.TypeDescriptionProvider`1[[Autodesk.AutoCAD.DatabaseServices.Line, acdbmgd]], acdbmgd")]
[Wrapper("AcDbLine")]
public class Line : Curve
{
[UnitType(UnitType.Angle)]
public double Angle
{
get
{
}
}
public Vector3d Delta
{
get
{
}
}
public Point3d EndPoint
{
get
{
}
set
{
}
}
[UnitType(UnitType.Distance)]
public double Length
{
get
{
}
}
public Vector3d Normal
{
get
{
}
set
{
}
}
public Point3d StartPoint
{
get
{
}
set
{
}
}
[UnitType(UnitType.Distance)]
public double Thickness
{
get
{
}
set
{
}
}
public Line(Point3d pointer1, Point3d pointer2)
{
}
public Line()
{
}
protected internal Line(IntPtr unmanagedObjPtr, bool autoDelete)
{
}
internal AcDbLine* GetImpObj()
{
}
}
From AutoDesk Folder it messed up but you get the idea
// Type: Autodesk.AutoCAD.DatabaseServices.Line
// Assembly: Acdbmgd, Version=18.2.0.0, Culture=neutral, PublicKeyToken=null
// Assembly location: C:\Program Files\Autodesk\AutoCAD MEP 2012\acdbmgd.dll
using \u003CCppImplementationDetails\u003E;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;
using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
namespace Autodesk.AutoCAD.DatabaseServices
{
[Wrapper("AcDbLine")]
[TypeDescriptionProvider("Autodesk.AutoCAD.ComponentModel.TypeDescriptionProvider`1[[Autodesk.AutoCAD.DatabaseServices.Line, acdbmgd]], acdbmgd")]
public class Line : Curve
{
[UnitType(UnitType.Distance)]
public double Length
{
[Category("Geometry")] get
{
AcGePoint3d acGePoint3d1;
AcGePoint3d acGePoint3d2;
return \u003CModule\u003E.AcGePoint3d\u002EdistanceTo(\u003CModule\u003E.AcDbLine\u002EstartPoint(this.GetImpObj(), &acGePoint3d1), \u003CModule\u003E.AcDbLine\u002EendPoint(this.GetImpObj(), &acGePoint3d2));
}
}
[UnitType(UnitType.Angle)]
public double Angle
{
[Category("Geometry")] get
{
AcGePoint3d acGePoint3d1;
\u003CModule\u003E.AcDbLine\u002EstartPoint(this.GetImpObj(), &acGePoint3d1);
AcGePoint3d acGePoint3d2;
\u003CModule\u003E.AcDbLine\u002EendPoint(this.GetImpObj(), &acGePoint3d2);
\u0024ArrayType\u0024\u0024\u0024BY02N arrayTypeBy02N1;
^(double&) @arrayTypeBy02N1 = ^(double&) @acGePoint3d1;
^(double&) ((IntPtr) &arrayTypeBy02N1 + 8) = ^(double&) ((IntPtr) &acGePoint3d1 + 8);
^(double&) ((IntPtr) &arrayTypeBy02N1 + 16) = ^(double&) ((IntPtr) &acGePoint3d1 + 16);
\u0024ArrayType\u0024\u0024\u0024BY02N arrayTypeBy02N2;
^(double&) @arrayTypeBy02N2 = ^(double&) @acGePoint3d2;
^(double&) ((IntPtr) &arrayTypeBy02N2 + 8) = ^(double&) ((IntPtr) &acGePoint3d2 + 8);
^(double&) ((IntPtr) &arrayTypeBy02N2 + 16) = ^(double&) ((IntPtr) &acGePoint3d2 + 16);
return \u003CModule\u003E.acutAngle((double*) &arrayTypeBy02N1, (double*) &arrayTypeBy02N2);
}
}
public Vector3d Delta
{
[Category("Geometry")] get
{
AcGePoint3d acGePoint3d1;
\u003CModule\u003E.AcDbLine\u002EendPoint(this.GetImpObj(), &acGePoint3d1);
\u0024ArrayType\u0024\u0024\u0024BY02N arrayTypeBy02N1;
^(double&) @arrayTypeBy02N1 = ^(double&) @acGePoint3d1;
^(double&) ((IntPtr) &arrayTypeBy02N1 + 8) = ^(double&) ((IntPtr) &acGePoint3d1 + 8);
^(double&) ((IntPtr) &arrayTypeBy02N1 + 16) = ^(double&) ((IntPtr) &acGePoint3d1 + 16);
\u0024ArrayType\u0024\u0024\u0024BY02N arrayTypeBy02N2;
\u003CModule\u003E.acdbWcs2Ucs((double*) &arrayTypeBy02N1, (double*) &arrayTypeBy02N2, false);
AcGePoint3d acGePoint3d2;
AcGePoint3d* acGePoint3dPtr = \u003CModule\u003E.AcDbLine\u002EstartPoint(this.GetImpObj(), &acGePoint3d2);
__memcpy(@acGePoint3d1, (IntPtr) acGePoint3dPtr, 24);
^(double&) @arrayTypeBy02N1 = ^(double&) @acGePoint3d1;
^(double&) ((IntPtr) &arrayTypeBy02N1 + 8) = ^(double&) ((IntPtr) &acGePoint3d1 + 8);
^(double&) ((IntPtr) &arrayTypeBy02N1 + 16) = ^(double&) ((IntPtr) &acGePoint3d1 + 16);
\u0024ArrayType\u0024\u0024\u0024BY02N arrayTypeBy02N3;
\u003CModule\u003E.acdbWcs2Ucs((double*) &arrayTypeBy02N1, (double*) &arrayTypeBy02N3, false);
^(double&) @arrayTypeBy02N1 = ^(double&) @arrayTypeBy02N2 - ^(double&) @arrayTypeBy02N3;
^(double&) ((IntPtr) &arrayTypeBy02N1 + 8) = ^(double&) ((IntPtr) &arrayTypeBy02N2 + 8) - ^(double&) ((IntPtr) &arrayTypeBy02N3 + 8);
^(double&) ((IntPtr) &arrayTypeBy02N1 + 16) = ^(double&) ((IntPtr) &arrayTypeBy02N2 + 16) - ^(double&) ((IntPtr) &arrayTypeBy02N3 + 16);
return new Vector3d(^(double&) @arrayTypeBy02N1, ^(double&) ((IntPtr) &arrayTypeBy02N1 + 8), ^(double&) ((IntPtr) &arrayTypeBy02N1 + 16));
}
}
public Vector3d Normal
{
[Category("Geometry")] get
{
AcGeVector3d acGeVector3d;
return new Vector3d(\u003CModule\u003E.AcDbLine\u002Enormal(this.GetImpObj(), &acGeVector3d));
}
set
{
int num = (int) \u003CModule\u003E.AcDbLine\u002EsetNormal(this.GetImpObj(), (AcGeVector3d*) (int) ¶m0);
if (num != 0)
throw new Autodesk.AutoCAD.Runtime.Exception((ErrorStatus) num);
}
}
[UnitType(UnitType.Distance)]
public double Thickness
{
[Category("General")] get
{
return \u003CModule\u003E.AcDbLine\u002Ethickness(this.GetImpObj());
}
set
{
int num = (int) \u003CModule\u003E.AcDbLine\u002EsetThickness(this.GetImpObj(), param0);
if (num != 0)
throw new Autodesk.AutoCAD.Runtime.Exception((ErrorStatus) num);
}
}
public override Point3d EndPoint
{
[Category("Geometry")] get
{
return base.EndPoint;
}
set
{
int num = (int) \u003CModule\u003E.AcDbLine\u002EsetEndPoint(this.GetImpObj(), (AcGePoint3d*) (int) ¶m0);
if (num != 0)
throw new Autodesk.AutoCAD.Runtime.Exception((ErrorStatus) num);
}
}
public override Point3d StartPoint
{
[Category("Geometry")] get
{
return base.StartPoint;
}
set
{
int num = (int) \u003CModule\u003E.AcDbLine\u002EsetStartPoint(this.GetImpObj(), (AcGePoint3d*) (int) ¶m0);
if (num != 0)
throw new Autodesk.AutoCAD.Runtime.Exception((ErrorStatus) num);
}
}
public Line(Point3d pointer1, Point3d pointer2)
{
void* voidPtr = \u003CModule\u003E.AcHeapOperators\u002EallocRawMem(8U);
AcDbLine* acDbLinePtr1 = (AcDbLine*) voidPtr;
AcDbLine* acDbLinePtr2;
// ISSUE: fault handler
try
{
acDbLinePtr2 = \u003CModule\u003E.AcDbLine\u002E\u007Bctor\u007D((AcDbLine*) voidPtr, (AcGePoint3d*) (int) &pointer1, (AcGePoint3d*) (int) &pointer2);
}
__fault
{
// ISSUE: method pointer
// ISSUE: cast to a function pointer type
\u003CModule\u003E.___CxxCallUnwindDelDtor((__FnPtr<void (void*)>) __methodptr(AcHeapOperators\u002Edelete), (void*) acDbLinePtr1);
}
// ISSUE: explicit constructor call
base.\u002Ector((IntPtr) ((void*) acDbLinePtr2), true);
}
public Line()
{
void* voidPtr = \u003CModule\u003E.AcHeapOperators\u002EallocRawMem(8U);
AcDbLine* acDbLinePtr1 = (AcDbLine*) voidPtr;
AcDbLine* acDbLinePtr2;
// ISSUE: fault handler
try
{
acDbLinePtr2 = \u003CModule\u003E.AcDbLine\u002E\u007Bctor\u007D((AcDbLine*) voidPtr);
}
__fault
{
// ISSUE: method pointer
// ISSUE: cast to a function pointer type
\u003CModule\u003E.___CxxCallUnwindDelDtor((__FnPtr<void (void*)>) __methodptr(AcHeapOperators\u002Edelete), (void*) acDbLinePtr1);
}
// ISSUE: explicit constructor call
base.\u002Ector((IntPtr) ((void*) acDbLinePtr2), true);
}
protected internal Line(IntPtr unmanagedObjPtr, [MarshalAs(UnmanagedType.U1)] bool autoDelete)
: base(unmanagedObjPtr, autoDelete)
{
}
internal unsafe AcDbLine* GetImpObj()
{
return (AcDbLine*) base.GetImpObj();
}
}
}
