在这里我们通过使用工具corflags.exe来查看被编译应用程序的CLR Version，corflags.exe来自Microsoft Windows SDK v6.0A
1. 打开Visual Studio 2008 Command Prompt
2. CD 到你的Assembly所在路径，比如说cd /d D:\Mesh\study\dotnet\SxS\CompileTest
3. 输入 corflags [Assembly Name]，从下面的例子我们可以看出分别由1.0, 1.1, 2.0 and 4.0 CLR编译而成的
D:\Mesh\study\dotnet\SxS\CompileTest>corflags Program_1.0.exe
Microsoft (R) .NET Framework CorFlags Conversion Tool. Version 3.5.21022.8
Copyright (c) Microsoft Corporation. All rights reserved.
Version : v1.0.3705
CLR Header: 2.0
PE : PE32
CorFlags : 1
ILONLY : 1
32BIT : 0
Signed : 0
D:\Mesh\study\dotnet\SxS\CompileTest>corflags Program_1.1.exe
Microsoft (R) .NET Framework CorFlags Conversion Tool. Version 3.5.21022.8
Copyright (c) Microsoft Corporation. All rights reserved.
Version : v1.1.4322
CLR Header: 2.0
PE : PE32
CorFlags : 1
ILONLY : 1
32BIT : 0
Signed : 0
D:\Mesh\study\dotnet\SxS\CompileTest>corflags Program_2.0.exe
Microsoft (R) .NET Framework CorFlags Conversion Tool. Version 3.5.21022.8
Copyright (c) Microsoft Corporation. All rights reserved.
Version : v2.0.50727
CLR Header: 2.5
PE : PE32
CorFlags : 1
ILONLY : 1
32BIT : 0
Signed : 0
D:\Mesh\study\dotnet\SxS\CompileTest>