Passing a 2D matrix in to a .NET class method which expects a System.Single[] argument

In Matlab I am calling an existing .NET class which contains methods to perform calculations. I am using one method, let's say DoSomeCalculation, which expects the argument to be in System.Single[] format. It works fine if I pass in a vector of singles from Matlab, but this is slow because I have to call DoSomeCalculation many times. I think it would be faster with one call to DoSomeCalculation if I could pass in a matrix of input vectors, say inputMat = single(rand(10000, 50)) containing 10000 input vectors. There's no error when the argument is inputMat(1,:), but when the argument is inputMat it gives the error,

No method 'DoSomeCalculation' with matching signature found for class 'SomeName.SomeOtherName.YetAnotherName.Calculations'.

Must the argument type be changed to System.Single[,] in order to accept a 2D array, as seems to be the case in the section 'DFS In Matlab' here? If so how can I do this? I apologize that I do not know enough about .NET to make a working example.

[KAE]

It turns out the issue was passing in a 2D matrix when .NET was only expecting a vector. This answer does indicate that it can be faster to "chunk" together input arguments rather than repeatedly calling .NET from a loop.