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CustomAttributeBuilder Constructor (ConstructorInfo, Object(), PropertyInfo(), Object(), FieldInfo(), Object())

Initializes an instance of the CustomAttributeBuilder class given the constructor for the custom attribute, the arguments to the constructor, a set of named property or value pairs, and a set of named field or value pairs.

Namespace:  System.Reflection.Emit
Assembly:  mscorlib (in mscorlib.dll)

Public Sub New ( _
	con As ConstructorInfo, _
	constructorArgs As Object(), _
	namedProperties As PropertyInfo(), _
	propertyValues As Object(), _
	namedFields As FieldInfo(), _
	fieldValues As Object() _


Type: System.Reflection.ConstructorInfo

The constructor for the custom attribute.

Type: System.Object()

The arguments to the constructor of the custom attribute.

Type: System.Reflection.PropertyInfo()

Named properties of the custom attribute.

Type: System.Object()

Values for the named properties of the custom attribute.

Type: System.Reflection.FieldInfo()

Named fields of the custom attribute.

Type: System.Object()

Values for the named fields of the custom attribute.


The lengths of the namedProperties and propertyValues arrays are different.


The lengths of the namedFields and fieldValues arrays are different.


con is static or private.


The number of supplied arguments does not match the number of parameters of the constructor as required by the calling convention of the constructor.


The type of supplied argument does not match the type of the parameter declared in the constructor.


The types of the property values do not match the types of the named properties.


The types of the field values do not match the types of the corresponding field types.


A property has no setter.


The property or field does not belong to the same class or base class as the constructor.


A supplied argument, named property, or named field is a reference type other than String or Type.


One of the parameters is Nothing.

The elements of the constructorArgs, propertyValues, or fieldValues arrays are restricted to element types. They can be byte, sbyte, int, uint, long, ulong, float, double, String, char, bool, an enum, a type, any of the previous types that was cast to an object, or a single-dimension, zero-based array of any of the previous types.

Important noteImportant

Do not include private properties or fields in namedProperties or namedFields. Doing so will cause CustomAttributeFormatException to be thrown when the GetCustomAttributes method is later called on the completed type.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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