JJ.Framework.Reflection 1.5.6877.41324

Prefix Reserved
dotnet add package JJ.Framework.Reflection --version 1.5.6877.41324                
NuGet\Install-Package JJ.Framework.Reflection -Version 1.5.6877.41324                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="JJ.Framework.Reflection" Version="1.5.6877.41324" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add JJ.Framework.Reflection --version 1.5.6877.41324                
#r "nuget: JJ.Framework.Reflection, 1.5.6877.41324"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install JJ.Framework.Reflection as a Cake Addin
#addin nuget:?package=JJ.Framework.Reflection&version=1.5.6877.41324

// Install JJ.Framework.Reflection as a Cake Tool
#tool nuget:?package=JJ.Framework.Reflection&version=1.5.6877.41324                


Extensions to the System.Reflection and System.Linq.Expressions namespaces.


Converts many types of lambda expressions into text or retrieves its resulting value. Here are some of the things it can do:

For instance:

ExpressionHelper.GetText(() => myParam.MyProperty.MyList[i].MySomething)

Will return the string:


Similarly you can retrieve its value:

ExpressionHelper.GetValue(() => myParam.MyProperty.MyList[i].MySomething)

which can return:


It can also give you method info, parameter names and parameter value info from lambda expressions.

For instance:

ExpressionHelper.GetMethodCallInfo(() => MyMethod(3));

Will return:

	Name = "MyMethod",
	Parameters = 
		ParameterType = typeof(int),
		Name = "myParameter",
		Value = 3


Allows easy access to the internal, private or protected elements of an assembly or class.

For instance if you have the following private method in a class:

class MyClass
    private int MyPrivateMethod(int myParameter)
        return 3;

You can run that private method, that would otherwise not be available:

var myObject = new MyClass();
var accessor = new MyAccessor(myObject);
int myInt = accessor.MyPrivateMethod(1);

You can do that by writing the following wrapper class:

class MyAccessor
    Accessor _accessor;

    public MyAccessor(MyClass myObject) => _accessor = new Accessor(myObject);

    public int MyPrivateMethod(int myParameter) 
		=> _accessor.InvokeMethod(() => MyPrivateMethod(default), myParameter);


Makes using reflection much faster in certain cases. For instance the GetProperties method can be expensive, which is much faster through the ReflectionCache class.


private static readonly ReflectionCache _reflectionCache 
	= new ReflectionCache(BindingFlags.Public | BindingFlags.Instance);

PropertyInfo[] properties = _reflectionCache.GetProperties(typeof(MyClass));

You can also get other types of constructs in a fast way:

  • GetFields
  • GetConstructor
  • GetTypeByShortName


Various helper methods, but one of the most useful features is the GetImplementation method and variations thereof, which allow you to retrieve implementations of a specified base class or interface from an assembly, which is useful for plug-in development.

  • GetBaseClasses
    • Returns a type's base type and its base type, etc.
  • GetItemType
    • Gets the item type of a collection type.
  • GetImplementations
    • Allows you to retrieve implementations of a specified base class or interface from an assembly, which is useful for plug-in development.
  • GetPropertyOrException
    • Type.GetProperty returns null if the property does not exist. This method is a little safer than that and throws a clear exception if the property does not exist.
  • GetUnderlyingNullableTypeFast
    • Slightly faster than Nullable.GetUnderlyingType.
  • GetValue
    • Similar to PropertyInfo.GetValue, but for static properties you can now omit the object parameter.
  • IsAssignableFrom / IsAssignableTo
    • Similar to the original Type.IsAssignableFrom, but now also an IsAssignableTo variation, if you find that more intuitive. Also has variations with a type argument e.g. myInterfaceType.IsAssignableFrom<MyClass>();
  • IsIndexer
    • Can tell you if a MethodBase points to an indexer property.
  • IsNullableType
    • Can tell you if a Type is a nullable type.
  • IsProperty
    • Can tell you if a MethodBase is a property.
  • IsReferenceType
    • Can tell you if a Type is a reference type.
  • IsStatic
    • Can tell you if a MemberInfo is static.
  • IsSimpleType
    • Tells you if a Type is a 'simple type'. A simple type can be a .NET primitive types: Boolean, Char, Byte, IntPtr, UIntPtr, the numeric types, their signed and unsigned variations, but also String, Guid, DateTime, TimeSpan and Enum types.


  • CreateInstance
    • A variation on the existing Type.CreateInstance, that takes a type name as a string, instead of a Type.
  • IsDefault
    • Can tell you if a value is the default value for its type. (E.g. 0 is the default value for Int32.)
  • IsSimpleType
    • Tells you if a value is of a 'simple type'. A simple type can be a .NET primitive types: Boolean, Char, Byte, IntPtr, UIntPtr, the numeric types, their signed and unsigned variations, but also String, Guid, DateTime, TimeSpan and Enum types.
  • TypesFromObjects
    • You can pass objects to it, and it will return the concrete types of those objects, with some tolerance for nulls.
Product Compatible and additional computed target framework versions.
.NET Framework net461 is compatible.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (7)

Showing the top 5 NuGet packages that depend on JJ.Framework.Reflection:

Package Downloads

Contains many exception classes for common basic errors. Clear messages, concise syntax, strongly-typed, good performance. Generates messages like "myParent.MyChildren[0].MyProperty is null.", "height of 2 is less than 10.", "Customer with key { customerNumber = 1234, customerType = Subscriber } not found."


Makes it easier to convert simple types.


XmlToObjectConverter converts an XmlDocument or string to an object graph. The way to map XML to classes is easier than the classic ways in .NET. XmlHelper allows you to access XML in a null-safe and multiplicity-safe way. It uses XmlDocument as the underlying .NET API.


LINQ overloads. SelectRecursive SelectAncestors Add Remove AddRange Concat CrossJoin Distinct DistinctMany Except FirstWithClearException SingleOrDefaultWithClearException SingleWithClearException ForEach IndexOf TryGetIndexOf MinOrDefault MaxOrDefault PeekOrDefault PopOrDefault Product RemoveFirst Repeat ToHashSet ToNonUniqueDictionary TrimAll TryRemoveFirst Union Zip item.AsArray item.AsList item.AsEnumerable. Also a RedBlackTree and KeyValuePairHelper ConvertNamesAndValuesListToKeyValuePairs and ConvertNamesAndValuesListToDictionary.


Helper for unit tests. Mimics the Assert class, but will display the tested expression in error messages, instead of being vague about it or laborious to program. It also offers methods to evaluate if the right exception goes off in the right spot with the right exception type and / or the right message.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
1.5.6877.41324 10,299 10/31/2018
1.4.6874.33783 8,273 10/27/2018
1.4.6870.35782 7,843 10/23/2018
1.4.6870.35459 8,667 10/23/2018
1.4.6862.40441 13,504 10/15/2018
1.3.6681.33420 6,896 4/17/2018
1.2.6640.39173 6,047 3/7/2018 6,345 3/4/2018
1.0.6633.36153 1,719 2/28/2018
1.0.6633.34565 10,608 2/28/2018