Sharepoint 2010 Solution Installer

http://netindonesia.net/blogs/andriyadi/archive/2010/02/27/sharepoint-2010-solution-installer.aspx

Unable to cast object of type 'Microsoft.SharePoint.Administration.SPWebApplication' to type 'Microsoft.SharePoint.SPSite

Today I have found error "Unable to cast object of type Microsoft.SharePoint.Administration.SPWebApplication' to type 'Microsoft.SharePoint.SPSite" during deploy moss 2010 solution.

I have set scope as "Site" and due to that above issue is occured.
I have changed scope as "WebApplication" and rebuild it and after deploy it.
So Its working Fine and solution is deployed successfully.

Cheers.

Workflow Custom Activity in MOSS 2010

http://www.zimbio.com/VisualStudio/articles/qMY82wdzeBR/Walkthrough+3+SharePoint+Designer+Workflows
http://sharepointbloggin.com/2010/02/10/walkthrough-3-sharepoint-designer-workflows-imported-to-visual-studio-2010/

an unhandled exception occurred in the silverlight application sharepoint 2010

I guess it's a product bug. Just Enable the Security Validation from Manage Web Applications --> General Settings (from ribbon).

Silverlight Application is unable to connect to the WCF endpoint configured by the product for enabling Client Object Model, if Security validation is set to Off.

Enjoy...