我是EF的新手,当我尝试在PMC控制台中运行Enable-Migrations时出错：
使用“1”参数调用“LoadFrom”的异常：
使用“1”参数调用“LoadFrom”的异常：
"Could not load file or assembly 'file:///...\pa
ckages\EntityFramework.6.0.1\tools\EntityFramework.PowerShell.Utility.dll' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515)"
At ...\packages\EntityFramework.6.1.1\tools\EntityFramework.psm1:780 char:62
+ $utilityAssembly = [System.Reflection.Assembly]::LoadFrom <<<< ((Join-Path $ToolsPath EntityFramework.PowerShell.Utility.dll))
+ CategoryInfo : NotSpecified: (:) [],MethodInvocationException
+ FullyQualifiedErrorId : DotNetMethodException
You cannot call a method on a null-valued expression.
At ...\packages\EntityFramework.6.1.1\tools\EntityFramework.psm1:781 char:50
+ $dispatcher = $utilityAssembly.CreateInstance <<<< (
+ CategoryInfo : InvalidOperation: (CreateInstance:String) [],RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull
Exception calling "CreateInstanceFrom" with "8" argument(s): "Could not load file or assembly 'file:///...\packages\EntityFramework.6.0.1\tools\EntityFramework.PowerShell.dll' or one of its dependencies. Operation is no t supported. (Exception from HRESULT: 0x80131515)"
At ...\packages\EntityFramework.6.1.1\tools\EntityFramework.psm1:809 char:31
+ $domain.CreateInstanceFrom <<<< (
+ CategoryInfo : NotSpecified: (:) [],MethodInvocationException
+ FullyQualifiedErrorId : DotNetMethodException
