System.Data.EntityClient not recognized, by code.but recognized by web.config - silverlight-4.0

Question

When I simply run the project, data is get from server no problems, but there's a requirement of connection string to be in code.
According to material on net I did the following, but just cannot solve the error.
Error
The specified store provider cannot be found in the configuration, or is not valid.
domainservice
public class DomainService1 : LinqToEntitiesDomainService<EMPLOYEEEntities>
{
public override void Initialize(DomainServiceContext context)
{
EntityConnectionStringBuilder builder = new EntityConnectionStringBuilder();
builder.Provider = "System.Data.EntityClient";
builder.ProviderConnectionString = #"Data Source=A-63A9D4D7E7834\THIRD;Initial Catalog=EMPLOYEE;Integrated Security=True;";
builder.Metadata = string.Format(#"res://*/{0}.csdl|
res://*/{0}.ssdl|
res://*/{0}.msl", "Model1");
this.ObjectContext.Connection.ConnectionString = builder.ConnectionString;
base.Initialize(context);
}
web.config
<connectionStrings>
<add name="EMPLOYEEEntities"
connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=System.Data.SqlClient;provider connection string="Data Source=A-63A9D4D7E7834\THIRD;Initial Catalog=EMPLOYEE;Integrated Security=True;MultipleActiveResultSets=True""
providerName="System.Data.EntityClient" />
</connectionStrings>

Answer 1

The "System.Data.EntityClient" is a combination of many namespaces/libs therefore it is not recognized.
the right way would be,
public IQueryable<Table1> GetTable1()
{
// Specify the provider name, server and database.
string providerName = "System.Data.SqlClient";
string serverName = #"A-63A9D4D7E7834\THIRD";
string databaseName = "EMPLOYEE";
// Initialize the connection string builder for the
// underlying provider.
SqlConnectionStringBuilder sqlBuilder =
new SqlConnectionStringBuilder();
// Set the properties for the data source.
sqlBuilder.DataSource = serverName;
sqlBuilder.InitialCatalog = databaseName;
sqlBuilder.IntegratedSecurity = true;
sqlBuilder.MultipleActiveResultSets=True;
// Build the SqlConnection connection string.
string providerString = sqlBuilder.ToString();
// Initialize the EntityConnectionStringBuilder.
EntityConnectionStringBuilder entityBuilder =
new EntityConnectionStringBuilder();
//Set the provider name.
entityBuilder.Provider = providerName;
// Set the provider-specific connection string.
entityBuilder.ProviderConnectionString = providerString;
// <add name="EMPLOYEEEntities" connectionString="metadata=res://*/Models.Model1.csdl|res://*/Models.Model1.ssdl|res://*/Models.Model1.msl;provider=System.Data.SqlClient;provider connection string="Data Source=A-63A9D4D7E7834\THIRD;Initial Catalog=EMPLOYEE;Integrated Security=True;MultipleActiveResultSets=True"" providerName="System.Data.EntityClient" />
// Set the Metadata location.
entityBuilder.Metadata = #"res://*/Models.Model1.csdl|
res://*/Models.Model1.ssdl|
res://*/Models.Model1.msl";
Console.WriteLine(entityBuilder.ToString());
// EntityConnection conn = new EntityConnection(entityBuilder.ToString());
/*
using (EntityConnection conn =
new EntityConnection(entityBuilder.ToString()))
{
conn.Open();
Response.Write("this is a web application");
Console.WriteLine("Just testing the connection.");
conn.Close();
}*/
this.ObjectContext.Connection.ConnectionString = entityBuilder.ToString();
// this.ObjectContext.Connection.Open();
// this.ObjectContext.Connection.BeginTransaction();
// this.ObjectContext.Table1.OrderBy(q => q.ID);
IQueryable<Table1> results = this.ObjectContext.Table1.OrderBy(q => q.ID);
// this.ObjectContext.Connection.Close();
return results;
}