startIndex cannot be larger than length of string. Parameter name: startIndex

at System.String.Substring(Int32 startIndex, Int32 length) at ASP._Page_Views_MacroPartials_GetContent_cshtml.<>c__DisplayClasse.<RenderContentParts>b__d(TextWriter __razor_helper_writer) in c:\inetpub\websites\dfes-prosiect-data\Views\MacroPartials\GetContent.cshtml:line 131 at System.Web.WebPages.WebPageBase.Write(HelperResult result) at ASP._Page_Views_MacroPartials_GetContent_cshtml.Execute() in c:\inetpub\websites\dfes-prosiect-data\Views\MacroPartials\GetContent.cshtml:line 14