private void CheckQueryableType(Type queryableType)
{
LinqUtility.CheckTypeIsAssignableFrom("queryableType", queryableType, typeof(IQueryable));
var queryableTypeInfo = queryableType.GetTypeInfo();
if (!queryableTypeInfo.IsGenericTypeDefinition)
{
var message = string.Format(
"Expected the generic type definition of an implementation of IQueryable<T>, but was '{0}'.",
queryableType);
throw new ArgumentException(message, "queryableType");
}
var genericArgumentCount = queryableTypeInfo.GenericTypeParameters.Length;
if (genericArgumentCount != 1)
{
var message = string.Format(
"Expected the generic type definition of an implementation of IQueryable<T> with exactly one type argument, but found {0} arguments on '{1}.",
genericArgumentCount,
queryableType);
throw new ArgumentException(message, "queryableType");
}
}