public static AssignmentContext GetAssignmentDbContext(string dbName)
{
// Create options for DbContext instance
var options = new DbContextOptionsBuilder <AssignmentContext>()
.UseInMemoryDatabase(databaseName: dbName)
.Options;
// Create instance of DbContext
var dbContext = new AssignmentContext(options);
// Add entities in memory
dbContext.Seed();
return(dbContext);
}