c3d-class-reference

name	c3d-class-reference
description	Quick reference for Civil 3D .NET API classes - instant class lookups

Civil 3D .NET API Class Reference

Quick lookup for 959 classes across 19 namespaces

When to Use This Skill

• Looking for a specific class name
• Checking what classes exist in a namespace
• Finding the right type for a task
• Exploring available API surface

Core Namespaces (384 classes)

Autodesk.Civil.DatabaseServices

Main Civil 3D objects - Alignments, Surfaces, Profiles, Pipe Networks, etc.

Autodesk.Civil.DatabaseServices.Styles (163 classes)

Styles for all Civil 3D objects

Autodesk.Civil (241 classes)

Core types, enumerations, exceptions

Autodesk.Civil.Settings (86 classes)

Drawing and object settings

Autodesk.Civil.ApplicationServices (1 class)

Common Patterns

Get CivilDocument

using Autodesk.Civil.ApplicationServices;

CivilDocument civilDoc = CivilApplication.ActiveDocument;

Access Collections

using Autodesk.Civil.DatabaseServices;

ObjectIdCollection alignmentIds = civilDoc.GetAlignmentIds();
ObjectIdCollection surfaceIds = civilDoc.GetSurfaceIds();
ObjectIdCollection networkIds = civilDoc.GetPipeNetworkIds();
ObjectIdCollection pressureNetworkIds = civilDoc.GetPressurePipeNetworkIds();

Open Objects

using (Transaction tr = db.TransactionManager.StartTransaction())
{
    Alignment align = tr.GetObject(alignmentId, OpenMode.ForRead) as Alignment;
    Surface surf = tr.GetObject(surfaceId, OpenMode.ForRead) as Surface;

    tr.Commit();
}

Full Class Index

See api-reference/CLASS_INDEX.md for complete listing of all 959 types.

Related Skills

• /c3d-api:c3d-project-setup - Setting up .NET project for Civil 3D development
• /c3d-api:c3d-root-objects - CivilApplication, CivilDocument, settings hierarchy
• /c3d-api:c3d-alignments - Alignment creation, entities, geometry
• /c3d-api:c3d-surfaces - Surface creation, editing, data extraction
• /c3d-api:c3d-profiles - Profile layout, PVIs, profile views
• /c3d-api:c3d-pipe-networks - Gravity and pressure pipe network objects
• /c3d-api:c3d-corridors - Corridor creation, baselines, regions
• /c3d-api:c3d-points - CogoPoint, PointGroup, UDP access
• /c3d-api:c3d-label-styles - LabelStyle, components, hierarchy
• /c3d-api:c3d-custom-subassemblies - Subassembly SDK, CorridorState, geometry callbacks