Error message ‘Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.’

by

This error has no true magic bullet answer. The key is to have all the information to understand the problem. Most likely a dynamically loaded assembly is missing a referenced assembly. That assembly needs to be in the bin directory of your application.

Use this code to determine what is missing.

using System.IO;
using System.Reflection;
using System.Text;

try
{
    //The code that causes the error goes here.
}
catch (ReflectionTypeLoadException ex)
{
    StringBuilder sb = new StringBuilder();
    foreach (Exception exSub in ex.LoaderExceptions)
    {
        sb.AppendLine(exSub.Message);
        FileNotFoundException exFileNotFound = exSub as FileNotFoundException;
        if (exFileNotFound != null)
        {                
            if(!string.IsNullOrEmpty(exFileNotFound.FusionLog))
            {
                sb.AppendLine("Fusion Log:");
                sb.AppendLine(exFileNotFound.FusionLog);
            }
        }
        sb.AppendLine();
    }
    string errorMessage = sb.ToString();
    //Display or log the error based on your application.
}

More Related Contents:

  1. Using Transactions or SaveChanges(false) and AcceptAllChanges()?
  2. Entity Framework change connection at runtime
  3. Entity Framework (EF) Code First Cascade Delete for One-to-Zero-or-One relationship
  4. Update Row if it Exists Else Insert Logic with Entity Framework [closed]
  5. Insert/Update Many to Many Entity Framework . How do I do it?
  6. How to create a many-to-many mapping in Entity Framework?
  7. The type of one of the expressions in the join clause is incorrect in Entity Framework
  8. Entity Framework DateTime and UTC
  9. Linq to Entities, random order
  10. Can I reuse code for selecting a custom DTO object for a child property with EF Core?
  11. Linq to EntityFramework DateTime
  12. How to Bulk Update records in Entity Framework?
  13. How to declare one to one relationship using Entity Framework 4 Code First (POCO)
  14. Understanding ForeignKey attribute in entity framework code first
  15. EF 6 – How to correctly perform parallel queries
  16. Mapping Database Views to EF 5.0 Code First w/Migrations
  17. DbSet.Attach(entity) vs DbContext.Entry(entity).State = EntityState.Modified
  18. When should I create a new DbContext()
  19. EF migration for changing data type of columns
  20. EF 6 Parameter Sniffing
  21. Entity Framework Queryable async
  22. Delete a single record from Entity Framework?
  23. Entity framework raw SQL Query
  24. C# Entity-Framework: How can I combine a .Find and .Include on a Model Object?
  25. How to Identify the primary key duplication from a SQL Server 2008 error code?
  26. Entity Framework 4.1: Unable to cast from DbQuery to ObjectQuery
  27. Unable to find the requested .Net Framework Data Provider. It may not be installed
  28. Should Entity Framework Context be Put into Using Statement?
  29. Use both AddDbContextFactory() and AddDbContext() extension methods in the same project
  30. Implementing recursive property loading in EF Core

Leave a Comment