FieldInfo.FieldHandle Property

Definition

Namespace:

System.Reflection

Assemblies:

netstandard.dll, System.Runtime.dll

Source:

FieldInfo.CoreCLR.cs

Gets a RuntimeFieldHandle, which is a handle to the internal metadata representation of a field.

C#

public abstract RuntimeFieldHandle FieldHandle { get; }

Property Value

RuntimeFieldHandle

A handle to the internal metadata representation of a field.

Examples

The following example retrieves MyClass.MyField field information and displays the field associated with the field handle.

C#

using System;
using System.Reflection;

public class MyClass
{
    public string MyField = "Microsoft";
}

public class FieldInfo_FieldHandle
{
    public static void Main()
    {

        MyClass myClass =new MyClass();

        // Get the type of MyClass.
        Type myType = typeof(MyClass);

        try
        {
            // Get the field information of MyField.
            FieldInfo myFieldInfo = myType.GetField("MyField", BindingFlags.Public
                | BindingFlags.Instance);

            // Determine whether or not the FieldInfo object is null.
            if(myFieldInfo!=null)
            {
                // Get the handle for the field.
                RuntimeFieldHandle myFieldHandle=myFieldInfo.FieldHandle;

                DisplayFieldHandle(myFieldHandle);
            }
            else
            {
                Console.WriteLine("The myFieldInfo object is null.");
            }
        }
        catch(Exception e)
        {
            Console.WriteLine("Exception: {0}", e.Message);
        }
    }

    public static void DisplayFieldHandle(RuntimeFieldHandle myFieldHandle)
    {
        // Get the type from the handle.
        FieldInfo myField = FieldInfo.GetFieldFromHandle(myFieldHandle);

        // Display the type.
        Console.WriteLine("\nDisplaying the field from the handle.\n");
        Console.WriteLine("The type is {0}.", myField.ToString());
    }
}

Remarks

The handles are valid only in the appdomain in which they were obtained.

Applies to