Increment decrement counter example in Blazor page in ASP.Net

This almost works. Clicking Increment and Decrement works. But if I try to change the increment value, the value stays at 1 regardless.  

@page "/counter"

<h1>Counter</h1>

<p>Current count: @currentCount</p>

<button class="btn btn-primary" @onclick="IncrementCount" disabled="@(currentCount>10)">Click me +</button> 
<button class="btn btn-primary" @onclick="DecrementCount" disabled="@(currentCount==0)">Click Me -</button>
<input type="number" bind="@increment" />

@functions {
    int currentCount = 0;

    int increment = 1;
    void IncrementCount()
    {
        currentCount+=increment;
    }

    void DecrementCount()
    {
        currentCount--;
    }
}