我正在评估ServiceStack和OrmLite，并希望使用Firebird数据库进行尝试。使用ServiceStack.Northwind演示作为起始位置，当我将ServiceStack.OrmLite.Firebird引用添加到C＃程序集引用时，应用程序在启动时开始崩溃，并在程序集加载时出现null错误：
它在Global.asax.cs中发生的代码行：
public class AppHost : AppHostBase
{
public AppHost() : base("Northwind Web Services", typeof(CustomersService).Assembly) {} // <-- Here!
例外：
System.TypeLoadException was unhandled by user code
HResult=-2146233054
Message=Method 'Execute' in type 'ServiceStack.Host.ServiceController' from assembly 'ServiceStack, Version=4.0.11.0, Culture=neutral, PublicKeyToken=null' does not have an implementation.
Source=ServiceStack
TypeName=ServiceStack.Host.ServiceController
StackTrace:
at ServiceStack.ServiceStackHost..ctor(String serviceName, Assembly[] assembliesWithServices)
at ServiceStack.AppHostBase..ctor(String serviceName, Assembly[] assembliesWithServices)
at ServiceStack.Northwind.AppHost..ctor() in C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\ServiceStack.Northwind\Global.asax.cs:line 13
at ServiceStack.Northwind.Global.Application_Start(Object sender, EventArgs e) in C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\ServiceStack.Northwind\Global.asax.cs:line 31
InnerException:
演示源位于：https://github.com/ServiceStack/ServiceStack.Examples/tree/master/src/ServiceStack.Northwind
（只需更改是从包管理器控制台运行Install-Package ServiceStack.OrmLite.Firebird。）
这是包管理器控制台会话：
Package Manager Console Host Version 3.1.1.0
Type 'get-help NuGet' to see all available NuGet commands.
PM> Install-Package ServiceStack.OrmLite.Firebird
Attempting to gather dependencies information for package 'ServiceStack.OrmLite.Firebird.4.0.44' with respect to project 'ServiceStack.Northwind', targeting '.NETFramework,Version=v4.0'
Attempting to resolve dependencies for package 'ServiceStack.OrmLite.Firebird.4.0.44' with DependencyBehavior 'Lowest'
Resolving actions to install package 'ServiceStack.OrmLite.Firebird.4.0.44'
Resolved actions to install package 'ServiceStack.OrmLite.Firebird.4.0.44'
Removed package 'ServiceStack.Common.4.0.11' from 'packages.config'
Successfully uninstalled 'ServiceStack.Common.4.0.11' from ServiceStack.Northwind
Removed package 'ServiceStack.Interfaces.4.0.11' from 'packages.config'
Successfully uninstalled 'ServiceStack.Interfaces.4.0.11' from ServiceStack.Northwind
Removed package 'ServiceStack.OrmLite.4.0.11' from 'packages.config'
Successfully uninstalled 'ServiceStack.OrmLite.4.0.11' from ServiceStack.Northwind
Removed package 'ServiceStack.Text.4.0.11' from 'packages.config'
Successfully uninstalled 'ServiceStack.Text.4.0.11' from ServiceStack.Northwind
Adding package 'FirebirdSql.Data.FirebirdClient.4.7.0' to folder 'C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\packages'
Added package 'FirebirdSql.Data.FirebirdClient.4.7.0' to folder 'C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\packages'
Added package 'FirebirdSql.Data.FirebirdClient.4.7.0' to 'packages.config'
Successfully installed 'FirebirdSql.Data.FirebirdClient 4.7.0' to ServiceStack.Northwind
Adding package 'ServiceStack.Interfaces.4.0.44' to folder 'C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\packages'
Added package 'ServiceStack.Interfaces.4.0.44' to folder 'C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\packages'
Added package 'ServiceStack.Interfaces.4.0.44' to 'packages.config'
Successfully installed 'ServiceStack.Interfaces 4.0.44' to ServiceStack.Northwind
Adding package 'ServiceStack.Text.4.0.44' to folder 'C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\packages'
Added package 'ServiceStack.Text.4.0.44' to folder 'C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\packages'
Added package 'ServiceStack.Text.4.0.44' to 'packages.config'
Successfully installed 'ServiceStack.Text 4.0.44' to ServiceStack.Northwind
Adding package 'ServiceStack.Common.4.0.44' to folder 'C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\packages'
Added package 'ServiceStack.Common.4.0.44' to folder 'C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\packages'
Added package 'ServiceStack.Common.4.0.44' to 'packages.config'
Successfully installed 'ServiceStack.Common 4.0.44' to ServiceStack.Northwind
Adding package 'ServiceStack.OrmLite.4.0.44' to folder 'C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\packages'
Added package 'ServiceStack.OrmLite.4.0.44' to folder 'C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\packages'
Added package 'ServiceStack.OrmLite.4.0.44' to 'packages.config'
Successfully installed 'ServiceStack.OrmLite 4.0.44' to ServiceStack.Northwind
Adding package 'ServiceStack.OrmLite.Firebird.4.0.44' to folder 'C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\packages'
Added package 'ServiceStack.OrmLite.Firebird.4.0.44' to folder 'C:\dev\ServiceStack.Examples\src\ServiceStack.Northwind\packages'
Added package 'ServiceStack.OrmLite.Firebird.4.0.44' to 'packages.config'
Successfully installed 'ServiceStack.OrmLite.Firebird 4.0.44' to ServiceStack.Northwind
PM>