平面坐标转化经纬度,求高手给C# 方法,将下列坐标转化成经纬度

题目

平面坐标转化经纬度,求高手给C# 方法,将下列坐标转化成经纬度
53950.65966 98691.8174
53978.58712 98683.67092
53362.81266 98724.84873
53863.99434 101142.28989
48409.9036 99993.28906
50908.51168 98174.50808
49099.00161 98492.81168
52512.84237x0598539.16967
53351.11115x0598716.80958
51750.78065x05100777.04986
51747.37379x05100800.72085
51751.03526x05100828.39794
51761.01429x05100848.26565
51763.52895x05100875.76738
51799.82924x0599606.68054
53960.04626x0598516.41725
52940.37434x0598385.55078
51415.60828x05100887.84154
52718.39066x0598113.226
52542.09198x0598108.36898
52855.44734x0598633.82289
52854.8673x0598634.34291
52852.80505x0598658.28901
52830.66831x0598686.15015
51666.11801x05100025.7744
51576.32007x05100110.36634
51684.53488x05100016.75806
52636.69159x05101048.78356
54219.35851x0599337.31141
52895.52269x0599786.95608
53594.98016x0599531.0607
53793.77928x0599097.43091
53842.72084x05

答案

看不出是什么坐标系,哪一个是X,Y,又没有带号,坐标位数不够.（X是7位,Y是8位,如果Y是6位要有中央子午线）