它表示使用内部元数据标记的类型。
MSDN地址:https://msdn.microsoft.com/zh-cn/library/system.runtimetypehandle.aspx
PS:Type 是一个表示类型的抽象类;RuntimeType 是 Type 针对载入类型信息的具体实现;RuntimeTypeHandle 则是类型唯一的抽象句柄。参阅http://www.cnblogs.com/dudu/articles/9984.html【Type, RuntimeType and RuntimeTypeHandle】,此处摘录部分内容和代码:
RuntimeType 是 System 名字空间的内部类,用于实现对普通类型的运行时信息提供代码。Type中很多抽象函数如 Type.GetMethodImpl 都是在 RuntimeType 中实现的。与 TypeBuilder 等不同,RuntimeType 是类型的运行时表现。
RuntimeTypeHandle 是运行时类型的抽象句柄,结构内部实际上是一个 Unamanged 指针。可以使用 Type.GetTypeFromHandle() 函数、Type.TypeHandle 属性和 Type.GetTypeHandle() 函数,完成在类型句柄、类型和对象之间的双向转换。例如:
MyClass1 cls = new MyClass1();
Debug.Assert(cls.GetType().TypeHandle.Equals(Type.GetTypeHandle(cls)));
Debug.Assert(Type.GetTypeFromHandle(cls.GetType().TypeHandle) == typeof(MyClass1));
using System;
using System.Reflection;
public class MyClass1
{
private int x=0;
public int MyMethod()
{
return x;
}
}
public class MyClass2
{
public static void Main()
{
MyClass1 myClass1 = new MyClass1();
// Get the RuntimeTypeHandle from an object.
RuntimeTypeHandle myRTHFromObject = Type.GetTypeHandle(myClass1);
// Get the RuntimeTypeHandle from a type.
RuntimeTypeHandle myRTHFromType = typeof(MyClass1).TypeHandle;
Console.WriteLine("\nmyRTHFromObject.Value: {0}", myRTHFromObject.Value);
Console.WriteLine("myRTHFromObject.GetType(): {0}", myRTHFromObject.GetType());
Console.WriteLine("Get the type back from the handle...");
Console.WriteLine("Type.GetTypeFromHandle(myRTHFromObject): {0}",
Type.GetTypeFromHandle(myRTHFromObject));
Console.WriteLine("\nmyRTHFromObject.Equals(myRTHFromType): {0}",
myRTHFromObject.Equals(myRTHFromType));
Console.WriteLine("\nmyRTHFromType.Value: {0}", myRTHFromType.Value);
Console.WriteLine("myRTHFromType.GetType(): {0}", myRTHFromType.GetType());
Console.WriteLine("Get the type back from the handle...");
Console.WriteLine("Type.GetTypeFromHandle(myRTHFromType): {0}",
Type.GetTypeFromHandle(myRTHFromType));
}
}
/* This code example produces output similar to the following:
myRTHFromObject.Value: 799464
myRTHFromObject.GetType(): System.RuntimeTypeHandle
Get the type back from the handle...
Type.GetTypeFromHandle(myRTHFromObject): MyClass1
myRTHFromObject.Equals(myRTHFromType): True
myRTHFromType.Value: 799464
myRTHFromType.GetType(): System.RuntimeTypeHandle
Get the type back from the handle...
Type.GetTypeFromHandle(myRTHFromType): MyClass1
*/