LINQ Aggregate

Can anyone see a way that I can calculate layerOutputs[layerIndex] using a LINQ expression?

Code:

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layerOutputs[layerIndex] = 0.0;
for (int layerInput = 0; layerInput < layerInputs.Length; layerInput++)
    layerOutputs[layerIndex] += _eventTree[layer][layerIndex] * layerInputs[layerInput];

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