# Matrix.IsIdentity Property

## Definition

Gets a value that indicates whether this Matrix structure is an identity matrix.

```
public:
property bool IsIdentity { bool get(); };
```

`public bool IsIdentity { get; }`

`member this.IsIdentity : bool`

`Public ReadOnly Property IsIdentity As Boolean`

#### Property Value

## Remarks

An identity matrix has a value of 1 in coefficients [1,1],[2,2],[3,3] and a value of 0 in the rest of the coefficients. This correlates to setting M11 and M22 to 1 and M12, M21, OffsetX, and OffsetY to 0. In an affine matrix, which is the implementation that Windows Presentation Foundation (WPF) uses for the Matrix structure, coefficients [3,1],[3,2],[3.3] are implied to always have the values 0,0,1 respectively.

1 | 0 | 0 |

0 | 1 | 0 |

0 | 0 | 1 |

For an identity matrix, the ToString method returns the string "Identity", instead of the coefficients of the Matrix.