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PropertyInfo.SetValue Method (Object, Object, Object[])

Sets the value of the property with optional index values for index properties.

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

public virtual void SetValue (
	Object obj,
	Object value,
	Object[] index
public void SetValue (
	Object obj, 
	Object value, 
	Object[] index
public function SetValue (
	obj : Object, 
	value : Object, 
	index : Object[]



The object whose property value will be set.


The new value for this property.


Optional index values for indexed properties. This value should be a null reference (Nothing in Visual Basic) for non-indexed properties.

Exception typeCondition


The index array does not contain the type of arguments needed.


The property's Get method is not found.


The object does not match the target type, or a property is an instance property but obj is a null reference (Nothing in Visual Basic).


The number of parameters in index does not match the number of parameters the indexed property takes.


There was an illegal attempt to access a private or protected method inside a class.

This is a convenience method that calls the runtime implementation of the abstract SetValue(Object,Object,BindingFlags,Binder,Object[],CultureInfo) method, specifying BindingFlags.Default for the BindingFlags parameter, a null reference (Nothing in Visual Basic) for Binder, and a null reference (Nothing in Visual Basic) for CultureInfo.

To use the SetValue method, first get a Type object that represents the class. From the Type, get the PropertyInfo. From the PropertyInfo, use the SetValue method.

  • ReflectionPermission  when invoked late-bound through mechanisms such as Type.InvokeMember. Associated enumeration: ReflectionPermissionFlag.MemberAccess.
  • ReflectionPermission  for reflecting non-public objects. Associated enumerations: ReflectionPermissionFlag.MemberAccess, ReflectionPermissionFlag.TypeInformation

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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