Programming language: C#
License: Microsoft Public License
Tags: Testing    
Latest version: v4.67

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Project Description

What you have been waiting for. Perform a deep compare of any two .NET objects using reflection. Shows the differences between the two objects.


  • Compatible with .NET Framework 4.0 and higher.
  • .NET Standard 1.3 Build Compatible with .NET Core 1.0, Mono 4.6, Xamarin.iOS 10.0, Xamarin.Mac 3.0, Xamarin.Android 7.0, Universal Windows Platform 10.0
  • .NET Standard 2.0 Build Compatible with .NET Core 2.0, Mono 5.4, Xamarin.iOS 10.14, Xamarin.Mac 3.8, Xamarin.Android 8.0, Universal Windows Platform 10.0.16299, Unity 2018.1
  • .NET Standard 2.1 Build Compatible with .NET 5, .NET 6, Mono 6.4, Xamarin.iOS 12.16, Xamarin.Mac 5.16, Xamarin.Android 10.0

NuGet Package



Install with NuGet Package Manager Console

Install-Package CompareNETObjects

Install with .NET CLI

dotnet add package CompareNETObjects


Feature Overview

  • Compare Children (on by default)
  • Handling for Trees with Children Pointing To Parents (Circular References)
  • Compares Publicly Visible Class Fields and Properties
  • Compares Private Fields and Properties (off by default)
  • Source code in C#
  • NUnit Test Project Included with over 275+ unit tests
  • Ability to load settings from a config file for use with powershell
  • Ability to pass in the configuration
  • Ability to save and load the configuration as json
  • Test Extensions .ShouldCompare and .ShouldNotCompare
  • Several configuration options for comparing private elements, ignoring specific elements, including specific elements.
  • Property and Field Info reflection caching for increased performance
  • Rich Differences List or simple DifferencesString
  • Difference Callback
  • Supports custom comparison for types and properties
  • ElapsedMilliseconds indicates how long the comparison took
  • Thread Safe
  • Beyond Compare Report
  • WinMerge Report
  • CSV Report
  • User Friendly Report
  • HTML Report


  • Ability to IgnoreCollectionOrder to compare lists of different lengths
  • Ability to ignore indexer comparison
  • Ability to ignore types
  • Ability to ignore specific members by name or by wildcard
  • Interface member filtering
  • Ability to treat string.empty and null as equal
  • Ability to ignore string leading and trailing whitespace
  • Case insensitive option for strings
  • Ignore millisecond differences between DateTime values or DateTimeOffset values
  • Precision for double or decimal values

Supported Types

  • Classes
  • Dynamic (Expando objects and Dynamic objects are supported)
  • Anonymous Types
  • Primitive Types (String, Int, Boolean, etc.)
  • Structs
  • IList Objects
  • Collections
  • Single and Multi-Dimensional Arrays
  • Immutable Arrays
  • IDictionary Objects
  • Enums
  • Timespans
  • Guids
  • Classes that Implement IList with Integer Indexers
  • DataSet Data
  • DataTable Data
  • DataRow Data
  • DataColumn Differences
  • LinearGradient
  • HashSet
  • URI
  • IPEndPoint (Supported for everything except .NET Standard 1.0)
  • Types of Type (RuntimeType)
  • StringBuilder
  • SByte


  • Custom Collections with Non-Integer Indexers cannot be compared.
  • Private properties and fields cannot be compared for .NET Core 1.3. They are allowed to be compared in .NET Core 2.0 and higher.
  • When ignoring the collection order, the collection matching spec must be a property on the class. It cannot be a field or a property on a child or parent class. The property has to be a simple type.
  • COM Objects are not compared. To compare COM objects wrap their properties in a .NET Object or create a custom comparer. Also See: https://stackoverflow.com/questions/9735394/reflection-on-com-interop-objects

Getting Started


Help File