Remove default Date from DateTimePicker value using C# and VB.Net in Windows Forms Application

Dear @chetan,

Please refer below references, it might be help you. 

C#

this.DateTimePicker.Format = System.Windows.Forms.DateTimePickerFormat.Custom;
this.DateTimePicker.CustomFormat = " ";

VB.Net

Me.DateTimePicker.Format = System.Windows.Forms.DateTimePickerFormat.Custom
Me.DateTimePicker.CustomFormat = " "

https://stackoverflow.com/questions/21988513/to-remove-date-picker-value-in-properties-using-windows-form

https://www.codeproject.com/Questions/491325/RemoveplusCurrentplusDateplusFocusplusfromplusDate

Refer the below Sample How set The Current Date as Defaut date To DateTimePicker in Windows Form.

Form

C#

private void Form1_Load(object sender, EventArgs e)
{
   // Set DatePicker Format as Custom
   this.dtpFromdate.Format = System.Windows.Forms.DateTimePickerFormat.Custom;
   this.dtpTodate.Format = System.Windows.Forms.DateTimePickerFormat.Custom;

   // Set Custome Date Formate
   this.dtpFromdate.CustomFormat = "dd/MM/yyyy"; // or "MM/dd/yyyy" 
   this.dtpTodate.CustomFormat = "dd/MM/yyyy"; //or "MM/dd/yyyy" 

   // Set Default date as todays date
   dtpFromdate.Value = DateTime.Now;
   dtpTodate.Value = DateTime.Now;
}

VB.Net

Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
    'Set DatePicker Format as Custom
    Me.dtpFromdate.Format = System.Windows.Forms.DateTimePickerFormat.Custom
    Me.dtpTodate.Format = System.Windows.Forms.DateTimePickerFormat.Custom
   
    'Set Custome Date Formate
    this.dtpFromdate.CustomFormat = "dd/MM/yyyy"; ' or "MM/dd/yyyy" 
    this.dtpTodate.CustomFormat = "dd/MM/yyyy"; ' or "MM/dd/yyyy"

    'Set Default date as todays date
    dtpFromdate.Value = DateTime.Now
    dtpTodate.Value = DateTime.Now
End Sub

Screenshot