Rotate matrix to 90 degree in C# – C# Programming Example
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Rotate matrix to 90 degree in C#

For Rotating a matrix to 90 degrees in-place, it should be a square matrix that is same number of Rows and Columns otherwise in-place solution is not possible and requires changes to row/column.

For a square array, we can do this inplace. First, notice that a 90 degree clockwise rotation is a matrix transpose, followed by a reflection (or if you prefer, a rotation), along the center of the array in the vertical direction. This leads to the following algorithm in C#

Matrix Class:


C# Program:




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