C# convert json to datatable,convert list to datatable

1 static datatable convertjsontotable(string jsonvalue)
2         {
3             datatable dt = (datatable)jsonconvert.deserializeobject(jsonvalue, typeof(datatable));             
4             return dt;          
5         }

static datatable convertlisttodatatable<t>(list<t> datalist)
        {
            datatable dt = new datatable();
            propertydescriptorcollection props = typedescriptor.getproperties(typeof(t));
            for(int i=0;i<props.count;i++)
            {
                propertydescriptor prop = props[i];
                dt.columns.add(prop.name, prop.propertytype);
            }
            object[] values = new object[props.count];
            foreach(t item in datalist)
            {
                for(int i=0;i<values.length;i++)
                {
                    values[i] = props[i].getvalue(item);
                }
                dt.rows.add(values);
            }
            return dt;
        }

 static datatable convertttodt<t>(list<t> datalist)
        {
            if(datalist==null || !datalist.any())
            {
                return null;
            }

            datatable dt = new datatable();
            propertyinfo[] pis = typeof(t).getproperties();
            for(int i=0;i<pis.count();i++)
            {
                dt.columns.add(pis[i].name, pis[i].propertytype);
            }

            object[] valuesarr = new object[pis.count()];
            foreach(var data in datalist)
            {
                for(int i=0;i<pis.count();i++)
                {
                    valuesarr[i] = pis[i].getvalue(data);
                }
                dt.rows.add(valuesarr);
            }             
            return dt;
        }