// (27,26): error CS0136: A local or parameter named 'x4' cannot be declared in this scope because that name is used in an enclosing local scope to define a local or parameter
// (37,26): error CS0136: A local or parameter named 'x5' cannot be declared in this scope because that name is used in an enclosing local scope to define a local or parameter
// (60,21): error CS0136: A local or parameter named 'x7' cannot be declared in this scope because that name is used in an enclosing local scope to define a local or parameter
// (72,34): error CS0136: A local or parameter named 'x9' cannot be declared in this scope because that name is used in an enclosing local scope to define a local or parameter
// (27,26): error CS0136: A local or parameter named 'x4' cannot be declared in this scope because that name is used in an enclosing local scope to define a local or parameter
// (37,26): error CS0136: A local or parameter named 'x5' cannot be declared in this scope because that name is used in an enclosing local scope to define a local or parameter
// (60,21): error CS0136: A local or parameter named 'x7' cannot be declared in this scope because that name is used in an enclosing local scope to define a local or parameter
// (72,34): error CS0136: A local or parameter named 'x9' cannot be declared in this scope because that name is used in an enclosing local scope to define a local or parameter