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MissingFieldException Class

The exception that is thrown when there is an attempt to dynamically access a field that does not exist.

System.Object
  System.Exception
    System.SystemException
      System.MemberAccessException
        System.MissingMemberException
          System.MissingFieldException

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)
[SerializableAttribute]
[ComVisibleAttribute(true)]
public class MissingFieldException : MissingMemberException, 
	ISerializable

The MissingFieldException type exposes the following members.

  NameDescription
Public methodMissingFieldException()Initializes a new instance of the MissingFieldException class.
Public methodMissingFieldException(String)Initializes a new instance of the MissingFieldException class with a specified error message.
Protected methodMissingFieldException(SerializationInfo, StreamingContext)Initializes a new instance of the MissingFieldException class with serialized data.
Public methodMissingFieldException(String, Exception)Initializes a new instance of the MissingFieldException class with a specified error message and a reference to the inner exception that is the cause of this exception.
Public methodMissingFieldException(String, String)Initializes a new instance of the MissingFieldException class with the specified class name and field name.
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  NameDescription
Public propertyDataGets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception.)
Public propertyHelpLinkGets or sets a link to the help file associated with this exception. (Inherited from Exception.)
Public propertyHResultGets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception.)
Public propertyInnerExceptionGets the Exception instance that caused the current exception. (Inherited from Exception.)
Public propertyMessageGets the text string showing the signature of the missing field, the class name, and the field name. This property is read-only. (Overrides MissingMemberException.Message.)
Public propertySourceGets or sets the name of the application or the object that causes the error. (Inherited from Exception.)
Public propertyStackTraceGets a string representation of the immediate frames on the call stack. (Inherited from Exception.)
Public propertyTargetSiteGets the method that throws the current exception. (Inherited from Exception.)
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  NameDescription
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetBaseExceptionWhen overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetObjectDataSets the SerializationInfo object with the class name, the member name, the signature of the missing member, and additional exception information. (Inherited from MissingMemberException.)
Public methodGetTypeGets the runtime type of the current instance. (Inherited from Exception.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringCreates and returns a string representation of the current exception. (Inherited from Exception.)
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  NameDescription
Protected eventSerializeObjectStateOccurs when an exception is serialized to create an exception state object that contains serialized data about the exception. (Inherited from Exception.)
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  NameDescription
Protected fieldClassNameHolds the class name of the missing member. (Inherited from MissingMemberException.)
Protected fieldMemberNameHolds the name of the missing member. (Inherited from MissingMemberException.)
Protected fieldSignatureHolds the signature of the missing member. (Inherited from MissingMemberException.)
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Normally a compilation error is generated if code attempts to access a nonexistent member of a class. MissingFieldException is designed to handle cases where an attempt is made to dynamically access a renamed or deleted field of an assembly that is not referenced by its strong name. The MissingFieldException is thrown when code in a dependent assembly attempts to access a missing field in an assembly that was modified.

MissingFieldException uses the HRESULT COR_E_MISSINGFIELD, that has the value 0x80131511.

For a list of initial property values for an instance of MissingFieldException, see the MissingFieldException constructors.

This example shows what happens if you attempt to use reflection to call a method that does not exist and access a field that does not exist. The application recovers by catching the MissingMethodException, MissingFieldException, and MissingMemberException.

using System;
using System.Reflection;

public class App
{
    public static void Main()
    {

        try
        {
            // Attempt to call a static DoSomething method defined in the App class. 
            // However, because the App class does not define this method, 
            // a MissingMethodException is thrown. 
            typeof(App).InvokeMember("DoSomething", BindingFlags.Static |
                BindingFlags.InvokeMethod, null, null, null);
        }
        catch (MissingMethodException e)
        {
            // Show the user that the DoSomething method cannot be called.
            Console.WriteLine("Unable to call the DoSomething method: {0}", e.Message);
        }

        try
        {
            // Attempt to access a static AField field defined in the App class. 
            // However, because the App class does not define this field, 
            // a MissingFieldException is thrown. 
            typeof(App).InvokeMember("AField", BindingFlags.Static | BindingFlags.SetField,
                null, null, new Object[] { 5 });
        }
        catch (MissingFieldException e)
        {
         // Show the user that the AField field cannot be accessed.
         Console.WriteLine("Unable to access the AField field: {0}", e.Message);
        }

        try
        {
            // Attempt to access a static AnotherField field defined in the App class. 
            // However, because the App class does not define this field, 
            // a MissingFieldException is thrown. 
            typeof(App).InvokeMember("AnotherField", BindingFlags.Static |
                BindingFlags.GetField, null, null, null);
        }
        catch (MissingMemberException e)
        {
         // Notice that this code is catching MissingMemberException which is the 
         // base class of MissingMethodException and MissingFieldException. 
         // Show the user that the AnotherField field cannot be accessed.
         Console.WriteLine("Unable to access the AnotherField field: {0}", e.Message);
        }
    }
}
// This code example produces the following output: 
// 
// Unable to call the DoSomething method: Method 'App.DoSomething' not found. 
// Unable to access the AField field: Field 'App.AField' not found. 
// Unable to access the AnotherField field: Field 'App.AnotherField' not found.

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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