It is assumed that the reachCsPoints max and min chainages are containing the given chainage, otherwise null is returned.
public static IFloodMapCrossSection GetClosestUpstreamGridPoint(
this IList<IFloodMapCrossSection> reachCsPoints,
double chainage
)[Missing <param name="reachCsPoints"/> documentation for "M:DHI.Mike1D.FloodMap.FloodMapExtensions.GetClosestUpstreamGridPoint(System.Collections.Generic.IList{DHI.Mike1D.FloodMap.IFloodMapCrossSection},System.Double)"]
[Missing <param name="chainage"/> documentation for "M:DHI.Mike1D.FloodMap.FloodMapExtensions.GetClosestUpstreamGridPoint(System.Collections.Generic.IList{DHI.Mike1D.FloodMap.IFloodMapCrossSection},System.Double)"]
[Missing <returns> documentation for "M:DHI.Mike1D.FloodMap.FloodMapExtensions.GetClosestUpstreamGridPoint(System.Collections.Generic.IList{DHI.Mike1D.FloodMap.IFloodMapCrossSection},System.Double)"]