[SOLVED] Getting Error regarding Solr after upgrading sitecore from 7.2 to 7.5

Getting Error regarding Solr after upgrading sitecore from 7.2 to 7.5

I am getting error on all pages after i upgraded the sitecore 7.2 system to Sitecore 7.5

Server Error in '/' Application.

Method 'get_IsSharded' in type 'Sitecore.ContentSearch.SolrProvider.SolrSearchIndex' from assembly 'Sitecore.ContentSearch.SolrProvider, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' does not have an implementation.

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.TypeLoadException: Method 'get_IsSharded' in type 'Sitecore.ContentSearch.SolrProvider.SolrSearchIndex' from assembly 'Sitecore.ContentSearch.SolrProvider, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' does not have an implementation.

Source Error: 


Line 80:             string fullTextQuery = "", List<Refinement> refinementFilter = null,
Line 81:             List<PrioritizedField> overrideContentPrioritizedFieldList = null)
Line 82:         {
Line 83:             var query = GetQueryableResults(indexName, language, templateGuidFilter, locationGuidFilter, fullTextQuery, refinementFilter, overrideContentPrioritizedFieldList);
Line 84:             return query != null ? query.Select(toItem => toItem.GetItem()).ToList() : null;

Any Help regarding this would be appreciated

Solution

You seems to have missed upgrading Solr support Package, Based on what version of 7.5 you have upgraded, you need to go CMS Updates Page and go to "Download the Solr support package" section and upgrade the dlls.