linq outmost mapping category library

i've struggling problem past integrate days haven't found solution.

i have an visible studio fortitude 2 projects, initial dll business objects logic, digest winform application, anxiety dependency initial project.

i primarily wrote business objects charge linq mapping all operative fine. following i guess i try outmost mapping. i followed few opposite guides should work; however, everytime i ran formula fortitude i invalidoperationexception: mapping problem: can't form 'org.example.system.material' mapping, winform attempts emanate datacontext object.

after perplexing opposite configurations xml record i placed duplicate category gui fortitude underneath opposite namespace worked. doubt is, illusory map an vigilant category library it accomplished.

samples

dbmap.xml

<database xmlns="http://schemas.microsoft.com/linqtosql/mapping/2007" name="gravel_dev"><table name="dbo.materials" member="material">
<type name="org.example.system.material">
  <column name="materialid" member="materialid" storage="mmaterialid" dbtype="uniqueidentifier null" isdbgenerated="true" isprimarykey="true"/>
  <column name="code" member="code" storage="mmaterialcode" dbtype="char(4)"/>
  <column name="description" member="description" storage="mdescription" dbtype="varchar(50)"/>
  <column name="unitprice" member="unitprice" storage="munitprice" dbtype="decimal(5,2)"/>
</type>

winform loading

xmlmappingsource mapping = xmlmappingsource.fromurl("dbmap.xml");
mcontext = new datacontext(properties.settings.default.dbconn, mapping);
reloadtable();