link Matlab and C#

Hi,I am doing some kind of data clustering,I use C# to get necessary data from my database,i.e matrix that represents my data.
Rows of that matrix represent words and columns represent documents,matrix is 1-0 matrix which means that ij element of matrix is 1 if i-th word appears in j-th document,and 0 otherwise. Then I use Matlab 7.1 to analyze that data,i.e do some clustering with Matlab kmeans function.My question is:
after Matlab groups my data(which is btw. very very large matrix) I would like to see which document is in which group?how can I do this using C#?I.e how can I accomplish this connection between matlab and C# program?I would like C# program be able to display these documents are in first group,these are in second group,etc. based on clustering results that I get from Matlab.