BC36645和#x9；vb.net中的错误

我正在使用Visual Studio 2015开发一个使用web表单和Visual Basic的网站。我的问题是发生了错误BC36645，阻止我构建解决方案。它被描述为“无法从这些参数推断出方法‘公共共享重载函数FromResult（of TResult）（result as TResult）as Task（of TResult）’中类型参数的数据类型。显式指定数据类型可能会更正此错误。”

我理解它的基本含义。然而，它被声明在一个我没有接触过的文件中，它是自动生成的。该文件为IdentityModels.vb，位于Models文件夹中

我在同一个解决方案中的另一个项目中遇到了相同的错误，我通过删除、重新创建项目并重建来解决。但这并不是解决问题的便捷方法

是否有人有同样的问题，可以解释它是关于什么，甚至有一个适当的解决办法

//伊娃·洛塔

编辑：

这是错误指向的文件的内容（错误出现在“Return Task.FromResult（GenerateUserIdentity（manager））”：

末级

#Region "Helpers"
Public Class 
Public Const XsrfKey As String = "xsrfKey"

Public Const ProviderNameKey As String = "providerName"
Public Shared Function GetProviderNameFromRequest(request As HttpRequest) As String
    Return request.QueryString(ProviderNameKey)
End Function

Public Const CodeKey As String = "code"
Public Shared Function GetCodeFromRequest(request As HttpRequest) As String
    Return request.QueryString(CodeKey)
End Function

Public Const UserIdKey As String = "userId"
Public Shared Function GetUserIdFromRequest(request As HttpRequest) As String
    Return HttpUtility.UrlDecode(request.QueryString(UserIdKey))
End Function

Public Shared Function GetResetPasswordRedirectUrl(code As String, request As HttpRequest) As String
    Dim absoluteUri = "/Account/ResetPassword?" + CodeKey + "=" + HttpUtility.UrlEncode(code)
    Return New Uri(request.Url, absoluteUri).AbsoluteUri.ToString()
End Function

Public Shared Function GetUserConfirmationRedirectUrl(code As String, userId As String, request As HttpRequest) As String
    Dim absoluteUri = "/Account/Confirm?" + CodeKey + "=" + HttpUtility.UrlEncode(code) + "&" + UserIdKey + "=" + HttpUtility.UrlEncode(userId)
    Return New Uri(request.Url, absoluteUri).AbsoluteUri.ToString()
End Function

Private Shared Function IsLocalUrl(url As String) As Boolean
    Return Not String.IsNullOrEmpty(url) AndAlso ((url(0) = "/"c AndAlso (url.Length = 1 OrElse (url(1) <> "/"c AndAlso url(1) <> "\"c))) OrElse (url.Length > 1 AndAlso url(0) = "~"c AndAlso url(1) = "/"c))
End Function

Public Shared Sub RedirectToReturnUrl(returnUrl As String, response As HttpResponse)
    If Not [String].IsNullOrEmpty(returnUrl) AndAlso IsLocalUrl(returnUrl) Then
        response.Redirect(returnUrl)
    Else
        response.Redirect("~/")
    End If
End Sub
End Class
#End Region

#地区“助手”
公共课
Public Const XsrfKey As String=“XsrfKey”
Public Const ProviderNameKey为String=“providerName”
公共共享函数GetProviderNameFromRequest（请求为HttpRequest）作为字符串
返回请求。查询字符串（ProviderNameKey）
端函数
Public Const code key As String=“code”
公共共享函数GetCodeFromRequest（请求为HttpRequest）作为字符串
返回请求。查询字符串（代码键）
端函数
Public Const UserIdKey As String=“userId”
公共共享函数GetUserIdFromRequest（请求为HttpRequest）作为字符串
返回HttpUtility.UrlDecode（request.QueryString（UserIdKey））
端函数
公共共享函数GetResetPasswordRedirectUrl（代码为字符串，请求为HttpRequest）为字符串
Dim absoluteUri=“/Account/ResetPassword？”+CodeKey+“=”+HttpUtility.UrlEncode（代码）
返回新Uri（request.Url，absoluteUri）.absoluteUri.ToString（）
端函数
公共共享函数GetUserConfirmationRedirectUrl（代码为字符串，用户ID为字符串，请求为HttpRequest）为字符串
Dim absoluteUri=“/Account/Confirm？”+CodeKey+“=”+HttpUtility.UrlEncode（代码）+“&+UserIdKey+”=”+HttpUtility.UrlEncode（用户ID）
返回新Uri（request.Url，absoluteUri）.absoluteUri.ToString（）
端函数
私有共享函数IsLocalUrl（url为字符串）为布尔值
返回Not String.IsNullOrEmpty（url）AndAlso（（url（0）=“/”c AndAlso（url.Length=1 OrElse（url（1）”/“c AndAlso url（1）”\“c）））OrElse（url.Length>1 AndAlso url（0）=“~”c AndAlso url（1）=“/”c））
端函数
公共共享子重定向返回URL（返回URL为字符串，响应为HttpResponse）
如果不是[String].IsNullOrEmpty（returnUrl）和IsLocalUrl（returnUrl），则
response.Redirect（返回URL）
其他的
响应。重定向（“~/”）
如果结束
端接头
末级
#末端区域

要解决此错误，您可以为一个或多个类型参数指定数据类型，而不是依赖类型推断。

向我们展示代码。问题是，我不知道要更改的位置和内容-它首先发生在一个项目中，而我根本没有任何脚本（尚未）.谢谢你的帮助！但是，我太没经验了，无法通过编辑代码来解决这个问题。所以我所做的就是删除项目，然后从头开始重新创建它们。。。

#Region "Helpers"
Public Class 
Public Const XsrfKey As String = "xsrfKey"

Public Const ProviderNameKey As String = "providerName"
Public Shared Function GetProviderNameFromRequest(request As HttpRequest) As String
    Return request.QueryString(ProviderNameKey)
End Function

Public Const CodeKey As String = "code"
Public Shared Function GetCodeFromRequest(request As HttpRequest) As String
    Return request.QueryString(CodeKey)
End Function

Public Const UserIdKey As String = "userId"
Public Shared Function GetUserIdFromRequest(request As HttpRequest) As String
    Return HttpUtility.UrlDecode(request.QueryString(UserIdKey))
End Function

Public Shared Function GetResetPasswordRedirectUrl(code As String, request As HttpRequest) As String
    Dim absoluteUri = "/Account/ResetPassword?" + CodeKey + "=" + HttpUtility.UrlEncode(code)
    Return New Uri(request.Url, absoluteUri).AbsoluteUri.ToString()
End Function

Public Shared Function GetUserConfirmationRedirectUrl(code As String, userId As String, request As HttpRequest) As String
    Dim absoluteUri = "/Account/Confirm?" + CodeKey + "=" + HttpUtility.UrlEncode(code) + "&" + UserIdKey + "=" + HttpUtility.UrlEncode(userId)
    Return New Uri(request.Url, absoluteUri).AbsoluteUri.ToString()
End Function

Private Shared Function IsLocalUrl(url As String) As Boolean
    Return Not String.IsNullOrEmpty(url) AndAlso ((url(0) = "/"c AndAlso (url.Length = 1 OrElse (url(1) <> "/"c AndAlso url(1) <> "\"c))) OrElse (url.Length > 1 AndAlso url(0) = "~"c AndAlso url(1) = "/"c))
End Function

Public Shared Sub RedirectToReturnUrl(returnUrl As String, response As HttpResponse)
    If Not [String].IsNullOrEmpty(returnUrl) AndAlso IsLocalUrl(returnUrl) Then
        response.Redirect(returnUrl)
    Else
        response.Redirect("~/")
    End If
End Sub
End Class
#End Region