Any \ Exists ignores bad \ multiple SimpleExpressions

[hmobius]

A call to Add() or Exists() simply ignores any parameters if they are either

• malformed SimpleExpressions
• more than one SimpleExpression, good or bad.

Suggest that the following tests should pass.

[Test]
public void ExistsWithStringParameterThrowsBadExpressionException()
{
   Assert.Throws<BadExpressionException>(() => _db.Users.Exists("Answer").ToList());
}
[Test]
public void ExistsWithColumnNameParameterThrowsBadExpressionException()
{
   Assert.Throws<BadExpressionException>(() => _db.Users.Exists(_db.Users.Id).ToList());
}
[Test]
public void ExistsWithMoreThanOneParameterThrowsArgumentException()
{
   Assert.Throws<ArgumentException>(() => _db.Users.Exists(_db.Users.Id == 1, _db.Users.Id > 0).ToList());
}

[markrendle]

Fixed