Get Identity value after Insert in LINQ C#

// Create object of entity
CustomerSalesInformation objCustomerSalesInformation = new CustomerSalesInformation();

// Fiil the entity information
objCustomerSalesInformation .Name = "test";

// Submit Query
ObjDatatContext.GetTable().InsertOnSubmit(objCustomerSalesInformation );

// Submit Changes
ObjDatatContext.SubmitChanges();

// Get Inserted ID

objCustomerSalesInformation .Id // Id is primary key column of CustomerSalesInformation Table