FormatException: Input string was not in a correct format #5640
Description
When working on replicating the TabSet component from the last Blazor community standup I got this exception with VS 2017 15.9 and the Blazor 0.7.0-preview1 build:
System.FormatException: Input string was not in a correct format.
at System.Text.StringBuilder.AppendFormatHelper(IFormatProvider provider, String format, ParamsArray args)
at System.String.FormatHelper(IFormatProvider provider, String format, ParamsArray args)
at System.String.Format(IFormatProvider provider, String format, Object[] args)
at Microsoft.AspNetCore.Razor.Language.DefaultRazorDiagnostic.GetMessage(IFormatProvider formatProvider)
at Microsoft.VisualStudio.Web.Editors.Razor.RazorCodeGenerator.NotifyOnCodeGenerationComplete()
at Microsoft.VisualStudio.Web.Editors.Razor.RazorCodeGenerator.<>c__DisplayClass67_0.<OnDocumentStructureChanged>b__0()
at Microsoft.Web.Editor.Utility.GuardedOperations.InvokeExtensionPoint(Object errorSource, Action action)
--- End of stack trace from previous location where exception was thrown ---
at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)
Here's the component file I was working on:
<ul class="nav nav-tabs">
@foreach (var tab in tabs)
{
<li class="nav-item">
<a onclick="@(() => SelectTab(tab))" class="nav-link @(tab==)
</li>
}
</ul>
@functions {
}