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Autodesk Civil 3D 2026
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    API Developer's Guide

    Topics in this section
    • About the Developer's Guide
    • Getting Started
    • Root Objects and Common Concepts
    • Surfaces
    • Alignments
    • Profiles
    • Sections Overview
    • Pipe Networks
    • Corridors
    • Points
    • Data Shortcuts
    • Rail
    • Creating Custom Subassemblies Using .NET
    • Converting VBA Subassemblies to .NET
    • Legacy COM API
    • .NET Core Developer's Guide

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