Tells whether the Expr represents a Mathematica matrix (that is, it has head List, every element has head List, and no deeper parts are themselves lists). Works like the Mathematica function MatrixQ.
The elements can be of any type (except lists).
public bool MatrixQ();
Requires that every element be of the specified type.
public bool MatrixQ(ExpressionType);
Expr Class | Wolfram.NETLink Namespace