Trim parameter values for trailing zeros C#

[dusan.naus.trz]

What am I doing wrong? Video in the attachment 

var activeDocument = ThisApplication.ActiveDocument;

var part = activeDocument as Inventor.PartDocument;

try
{
var m1 = "Delka";
//part.ComponentDefinition.Parameters.ModelParameters.AddByExpression(tbDelka.Text, Inventor.UnitsTypeEnum.kMillimeterLengthUnits, m1);
//part.ComponentDefinition.Parameters.ModelParameters[m1].Value = Convert.ToDouble(tbDelka.Text);
//chyba = part.ComponentDefinition.Parameters.ModelParameters[m1].Value = tbDelka.Text;

//var MyVar = part.ComponentDefinition.Parameters.ModelParameters[m1].Value = Math.Round(Convert.ToDouble(tbDelka.Text)/10,3, MidpointRounding.ToEven);
//var MyVar = part.ComponentDefinition.Parameters.ModelParameters[m1].Value = Math.Ceiling(Convert.ToDouble(tbDelka.Text) / 10);
var MyVar = part.ComponentDefinition.Parameters.ModelParameters[m1].Value = Convert.ToDouble(12345) / 10;

[bradeneuropeArthur]

Myvar.trailingzeros = false

[dusan.naus.trz]

I have been working in C # for only 4 days. I don't know where to put your piece of code. What will be the entire line? Where should I put it? 

[bradeneuropeArthur]

Last line!

[dusan.naus.trz]

I tried to put it on the last line and a mistake.

[dusan.naus.trz · Accepted solution]

The easiest solution for me. Replace Value with Expression

string m1 = "Delka";
part.ComponentDefinition.Parameters.ModelParameters[m1].Expression = tbDelka.Text;
part.Update();