Could not load file or assembly 'log4net, Version=1.2.10.0

Question

Server Error in '/' Application.
Could not load file or assembly 'log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.IO.FileLoadException: Could not load file or assembly 'log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of its dependencies. The located assembly's manifest definition does not match
the assembly reference. (Exception from HRESULT: 0x80131040)
Source Error:
Line 13: public partial class ReportViewer : System.Web.UI.Page
Line 14: {
Line 15: ReportDocument rptDocument = new ReportDocument();
Line 16: ParameterDiscreteValue crtParamDiscreteValue = new ParameterDiscreteValue();
Line 17: protected void Page_Load(object sender, EventArgs e)
Source File: d:\WEBDATA\sriramcollege.com\Reports\ReportViewer.aspx.cs    Line:
15
Stack Trace:
[FileLoadException: Could not load file or assembly 'log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)]
CrystalDecisions.Shared.SharedUtils..cctor() +0
[TypeInitializationException: The type initializer for 'CrystalDecisions.Shared.SharedUtils' threw an exception.]
CrystalDecisions.Shared.SharedUtils.get_CurrentControl() +18
CrystalDecisions.Shared.SharedUtils.GetEffectiveCulture() +8
CrystalDecisions.CrystalReports.Engine.CREngineRes.GetString(String name) +10
CrystalDecisions.CrystalReports.Engine.ReportDocument.CheckForCrystalReportsRuntime() +143
CrystalDecisions.CrystalReports.Engine.ReportDocument..cctor() +159
[TypeInitializationException: The type initializer for 'CrystalDecisions.CrystalReports.Engine.ReportDocument' threw an exception.]
CrystalDecisions.CrystalReports.Engine.ReportDocument..ctor() +0
ReportViewer..ctor() in d:\WEBDATA\sriramcollege.com\Reports\ReportViewer.aspx.cs:15
ASP.reports_reportviewer_aspx..ctor() in c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e63cc5e2\46d2498\App_Web_bvplj1td.0.cs:0
__ASP.FastObjectFactory_app_web_bvplj1td.Create_ASP_reports_reportviewer_aspx() in c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\e63cc5e2\46d2498\App_Web_bvplj1td.2.cs:0
System.Web.Compilation.BuildResultCompiledType.CreateInstance() +30
System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp) +100
System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) +31
System.Web.UI.PageHandlerFactory.System.Web.IHttpHandlerFactory2.GetHandler(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath) +64
System.Web.HttpApplication.MapHttpHandler(HttpContext context, String requestType, VirtualPath path, String pathTranslated, Boolean useAppConfig) +191
System.Web.MapHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +145
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

Answer 1

hi,
this is not even c# question.
anyhow, you have the same case as this one.
https://social.msdn.microsoft.com/Forums/en-US/9223655f-0cbd-441e-86a6-d53f3fb37d48/could-not-load-file-or-assembly-log4net-version12100?forum=netfxbcl
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